Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Imprime el primer elemento de {32, 35, 8, 21, 32, 6, 34, 46, 23, 14, 36, 21, 5, 17, 32, 15, 13, 20, 16, 25, 2, 32} con front().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{32, 35, 8, 21, 32, 6, 34, 46, 23, 14, 36, 21, 5, 17, 32, 15, 13, 20, 16, 25, 2, 32};
  std::cout << v.front() << "\n";
  return 0;
}
```

vector::front

Aquí tienes una solución:

```cpp
#include <iostream>
int main(){ std::cout << hola << "\n"; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Crea un std::vector con {5, 12, 32, 12, 48, 1, 12, 17, 36, 14, 5, 38, 20, 5, 21, 35, 34, 8, 34, 8, 50, 30, 31} e imprime size().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{5, 12, 32, 12, 48, 1, 12, 17, 36, 14, 5, 38, 20, 5, 21, 35, 34, 8, 34, 8, 50, 30, 31};
  std::cout << v.size() << "\n";
  return 0;
}
```

vector::size

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ vector<int> v; return 0; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

With std::vector {5, 12, 32, 12, 48, 1, 12, 17, 36, 14, 5, 38, 20, 5, 21, 35, 34, 8, 34, 8, 50, 30, 31}, print the last element using back().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{5, 12, 32, 12, 48, 1, 12, 17, 36, 14, 5, 38, 20, 5, 21, 35, 34, 8, 34, 8, 50, 30, 31};
  std::cout << v.back() << "\n";
  return 0;
}
```

vector::back

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ std::unique_ptr<int> p = new int(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Imprime el primer elemento de {5, 12, 32, 12, 48, 1, 12, 17, 36, 14, 5, 38, 20, 5, 21, 35, 34, 8, 34, 8, 50, 30, 31} con front().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{5, 12, 32, 12, 48, 1, 12, 17, 36, 14, 5, 38, 20, 5, 21, 35, 34, 8, 34, 8, 50, 30, 31};
  std::cout << v.front() << "\n";
  return 0;
}
```

vector::front

Aquí tienes una solución:

```cpp
#include <vector>
#include <numeric>
int main(){ std::vector<int> v{1,2}; auto s=accumulate(v); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

With std::vector {46, 25, 49, 1, 16, 45, 36, 31, 21, 25, 14, 32, 8, 39, 40, 0, 50, 50, 38, 38, 31, 21, 44, 37}, print the last element using back().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{46, 25, 49, 1, 16, 45, 36, 31, 21, 25, 14, 32, 8, 39, 40, 0, 50, 50, 38, 38, 31, 21, 44, 37};
  std::cout << v.back() << "\n";
  return 0;
}
```

vector::back

Aquí tienes una solución:

```cpp
#include <string>
int main(){ string s="a"; return s.size(); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Imprime el primer elemento de {46, 25, 49, 1, 16, 45, 36, 31, 21, 25, 14, 32, 8, 39, 40, 0, 50, 50, 38, 38, 31, 21, 44, 37} con front().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{46, 25, 49, 1, 16, 45, 36, 31, 21, 25, 14, 32, 8, 39, 40, 0, 50, 50, 38, 38, 31, 21, 44, 37};
  std::cout << v.front() << "\n";
  return 0;
}
```

vector::front

Aquí tienes una solución:

```cpp
#include <map>
int main(){ map<int,int> m; return m.count(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Crea un std::vector con {7, 44, 3, 23, 29, 23, 42, 26, 20, 22, 13, 49, 28, 21, 48, 12, 11, 24, 3, 26, 24, 32, 16, 11, 35} e imprime size().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{7, 44, 3, 23, 29, 23, 42, 26, 20, 22, 13, 49, 28, 21, 48, 12, 11, 24, 3, 26, 24, 32, 16, 11, 35};
  std::cout << v.size() << "\n";
  return 0;
}
```

vector::size

Aquí tienes una solución:

```cpp
#include <optional>
int main(){ optional<int> o=1; return o; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

With std::vector {7, 44, 3, 23, 29, 23, 42, 26, 20, 22, 13, 49, 28, 21, 48, 12, 11, 24, 3, 26, 24, 32, 16, 11, 35}, print the last element using back().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{7, 44, 3, 23, 29, 23, 42, 26, 20, 22, 13, 49, 28, 21, 48, 12, 11, 24, 3, 26, 24, 32, 16, 11, 35};
  std::cout << v.back() << "\n";
  return 0;
}
```

vector::back

Aquí tienes una solución:

```cpp
int main(){ cout << 1; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Imprime el primer elemento de {7, 44, 3, 23, 29, 23, 42, 26, 20, 22, 13, 49, 28, 21, 48, 12, 11, 24, 3, 26, 24, 32, 16, 11, 35} con front().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{7, 44, 3, 23, 29, 23, 42, 26, 20, 22, 13, 49, 28, 21, 48, 12, 11, 24, 3, 26, 24, 32, 16, 11, 35};
  std::cout << v.front() << "\n";
  return 0;
}
```

vector::front

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ std::vector<int> v{1,2}; reverse(v.begin(),v.end()); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Crea un std::vector con {24, 23, 4, 18, 7, 16, 32, 38, 20, 3, 24, 3, 37, 24, 19, 6, 29, 36, 48, 45, 20, 15, 41, 28, 17, 28} e imprime size().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{24, 23, 4, 18, 7, 16, 32, 38, 20, 3, 24, 3, 37, 24, 19, 6, 29, 36, 48, 45, 20, 15, 41, 28, 17, 28};
  std::cout << v.size() << "\n";
  return 0;
}
```

vector::size

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ auto p=make_unique<int>(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

With std::vector {24, 23, 4, 18, 7, 16, 32, 38, 20, 3, 24, 3, 37, 24, 19, 6, 29, 36, 48, 45, 20, 15, 41, 28, 17, 28}, print the last element using back().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{24, 23, 4, 18, 7, 16, 32, 38, 20, 3, 24, 3, 37, 24, 19, 6, 29, 36, 48, 45, 20, 15, 41, 28, 17, 28};
  std::cout << v.back() << "\n";
  return 0;
}
```

vector::back

Aquí tienes una solución:

```cpp
#include <iostream>
int main(){ std::cout << hola << "\n"; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Imprime el primer elemento de {24, 23, 4, 18, 7, 16, 32, 38, 20, 3, 24, 3, 37, 24, 19, 6, 29, 36, 48, 45, 20, 15, 41, 28, 17, 28} con front().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{24, 23, 4, 18, 7, 16, 32, 38, 20, 3, 24, 3, 37, 24, 19, 6, 29, 36, 48, 45, 20, 15, 41, 28, 17, 28};
  std::cout << v.front() << "\n";
  return 0;
}
```

vector::front

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ vector<int> v; return 0; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Crea un std::vector con {36, 36, 22, 15, 44, 29, 32, 36, 17, 21, 3, 11, 7, 1, 27, 42, 31, 46, 8, 30, 34, 2, 30, 34, 9, 20, 23} e imprime size().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{36, 36, 22, 15, 44, 29, 32, 36, 17, 21, 3, 11, 7, 1, 27, 42, 31, 46, 8, 30, 34, 2, 30, 34, 9, 20, 23};
  std::cout << v.size() << "\n";
  return 0;
}
```

vector::size

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ std::unique_ptr<int> p = new int(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

With std::vector {36, 36, 22, 15, 44, 29, 32, 36, 17, 21, 3, 11, 7, 1, 27, 42, 31, 46, 8, 30, 34, 2, 30, 34, 9, 20, 23}, print the last element using back().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{36, 36, 22, 15, 44, 29, 32, 36, 17, 21, 3, 11, 7, 1, 27, 42, 31, 46, 8, 30, 34, 2, 30, 34, 9, 20, 23};
  std::cout << v.back() << "\n";
  return 0;
}
```

vector::back

Aquí tienes una solución:

```cpp
#include <vector>
#include <numeric>
int main(){ std::vector<int> v{1,2}; auto s=accumulate(v); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Imprime el primer elemento de {36, 36, 22, 15, 44, 29, 32, 36, 17, 21, 3, 11, 7, 1, 27, 42, 31, 46, 8, 30, 34, 2, 30, 34, 9, 20, 23} con front().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{36, 36, 22, 15, 44, 29, 32, 36, 17, 21, 3, 11, 7, 1, 27, 42, 31, 46, 8, 30, 34, 2, 30, 34, 9, 20, 23};
  std::cout << v.front() << "\n";
  return 0;
}
```

vector::front

Aquí tienes una solución:

```cpp
#include <string>
int main(){ string s="a"; return s.size(); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Crea un std::vector con {14, 38, 2, 29, 32, 38, 49, 18, 45, 37, 0, 20, 46, 24, 14, 44, 4, 16, 18, 10, 26, 22, 27, 2, 38, 0, 31, 43} e imprime size().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{14, 38, 2, 29, 32, 38, 49, 18, 45, 37, 0, 20, 46, 24, 14, 44, 4, 16, 18, 10, 26, 22, 27, 2, 38, 0, 31, 43};
  std::cout << v.size() << "\n";
  return 0;
}
```

vector::size

Aquí tienes una solución:

```cpp
#include <map>
int main(){ map<int,int> m; return m.count(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

With std::vector {14, 38, 2, 29, 32, 38, 49, 18, 45, 37, 0, 20, 46, 24, 14, 44, 4, 16, 18, 10, 26, 22, 27, 2, 38, 0, 31, 43}, print the last element using back().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{14, 38, 2, 29, 32, 38, 49, 18, 45, 37, 0, 20, 46, 24, 14, 44, 4, 16, 18, 10, 26, 22, 27, 2, 38, 0, 31, 43};
  std::cout << v.back() << "\n";
  return 0;
}
```

vector::back

Aquí tienes una solución:

```cpp
#include <optional>
int main(){ optional<int> o=1; return o; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Imprime el primer elemento de {14, 38, 2, 29, 32, 38, 49, 18, 45, 37, 0, 20, 46, 24, 14, 44, 4, 16, 18, 10, 26, 22, 27, 2, 38, 0, 31, 43} con front().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{14, 38, 2, 29, 32, 38, 49, 18, 45, 37, 0, 20, 46, 24, 14, 44, 4, 16, 18, 10, 26, 22, 27, 2, 38, 0, 31, 43};
  std::cout << v.front() << "\n";
  return 0;
}
```

vector::front

Aquí tienes una solución:

```cpp
int main(){ cout << 1; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Crea un std::vector con {10, 12, 2, 17, 33, 10, 48, 47, 33, 12, 19, 31, 29, 14, 18, 33, 5, 6, 28, 39, 34, 35, 17, 12, 33, 4, 40, 25, 26} e imprime size().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{10, 12, 2, 17, 33, 10, 48, 47, 33, 12, 19, 31, 29, 14, 18, 33, 5, 6, 28, 39, 34, 35, 17, 12, 33, 4, 40, 25, 26};
  std::cout << v.size() << "\n";
  return 0;
}
```

vector::size

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ std::vector<int> v{1,2}; reverse(v.begin(),v.end()); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

With std::vector {10, 12, 2, 17, 33, 10, 48, 47, 33, 12, 19, 31, 29, 14, 18, 33, 5, 6, 28, 39, 34, 35, 17, 12, 33, 4, 40, 25, 26}, print the last element using back().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{10, 12, 2, 17, 33, 10, 48, 47, 33, 12, 19, 31, 29, 14, 18, 33, 5, 6, 28, 39, 34, 35, 17, 12, 33, 4, 40, 25, 26};
  std::cout << v.back() << "\n";
  return 0;
}
```

vector::back

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ auto p=make_unique<int>(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Imprime el primer elemento de {10, 12, 2, 17, 33, 10, 48, 47, 33, 12, 19, 31, 29, 14, 18, 33, 5, 6, 28, 39, 34, 35, 17, 12, 33, 4, 40, 25, 26} con front().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{10, 12, 2, 17, 33, 10, 48, 47, 33, 12, 19, 31, 29, 14, 18, 33, 5, 6, 28, 39, 34, 35, 17, 12, 33, 4, 40, 25, 26};
  std::cout << v.front() << "\n";
  return 0;
}
```

vector::front

Aquí tienes una solución:

```cpp
#include <iostream>
int main(){ std::cout << hola << "\n"; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

With std::vector {50, 28, 7, 3, 36, 27, 48, 41, 27, 33, 22, 9, 31, 8, 12, 13, 15, 2, 15, 13, 4, 25, 1, 0, 26, 41, 20, 35, 1, 2}, print the last element using back().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{50, 28, 7, 3, 36, 27, 48, 41, 27, 33, 22, 9, 31, 8, 12, 13, 15, 2, 15, 13, 4, 25, 1, 0, 26, 41, 20, 35, 1, 2};
  std::cout << v.back() << "\n";
  return 0;
}
```

vector::back

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ vector<int> v; return 0; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Imprime el primer elemento de {50, 28, 7, 3, 36, 27, 48, 41, 27, 33, 22, 9, 31, 8, 12, 13, 15, 2, 15, 13, 4, 25, 1, 0, 26, 41, 20, 35, 1, 2} con front().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{50, 28, 7, 3, 36, 27, 48, 41, 27, 33, 22, 9, 31, 8, 12, 13, 15, 2, 15, 13, 4, 25, 1, 0, 26, 41, 20, 35, 1, 2};
  std::cout << v.front() << "\n";
  return 0;
}
```

vector::front

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ std::unique_ptr<int> p = new int(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Crea un std::vector con {15, 46, 27, 44, 18, 11, 19, 7, 18, 42, 41, 20, 13, 32, 1, 47, 23, 50, 9, 29, 14, 26, 14, 32, 42, 27, 25, 35, 12, 24, 4} e imprime size().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{15, 46, 27, 44, 18, 11, 19, 7, 18, 42, 41, 20, 13, 32, 1, 47, 23, 50, 9, 29, 14, 26, 14, 32, 42, 27, 25, 35, 12, 24, 4};
  std::cout << v.size() << "\n";
  return 0;
}
```

vector::size

Aquí tienes una solución:

```cpp
#include <vector>
#include <numeric>
int main(){ std::vector<int> v{1,2}; auto s=accumulate(v); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

With std::vector {15, 46, 27, 44, 18, 11, 19, 7, 18, 42, 41, 20, 13, 32, 1, 47, 23, 50, 9, 29, 14, 26, 14, 32, 42, 27, 25, 35, 12, 24, 4}, print the last element using back().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{15, 46, 27, 44, 18, 11, 19, 7, 18, 42, 41, 20, 13, 32, 1, 47, 23, 50, 9, 29, 14, 26, 14, 32, 42, 27, 25, 35, 12, 24, 4};
  std::cout << v.back() << "\n";
  return 0;
}
```

vector::back

Aquí tienes una solución:

```cpp
#include <string>
int main(){ string s="a"; return s.size(); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Imprime el primer elemento de {15, 46, 27, 44, 18, 11, 19, 7, 18, 42, 41, 20, 13, 32, 1, 47, 23, 50, 9, 29, 14, 26, 14, 32, 42, 27, 25, 35, 12, 24, 4} con front().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{15, 46, 27, 44, 18, 11, 19, 7, 18, 42, 41, 20, 13, 32, 1, 47, 23, 50, 9, 29, 14, 26, 14, 32, 42, 27, 25, 35, 12, 24, 4};
  std::cout << v.front() << "\n";
  return 0;
}
```

vector::front

Aquí tienes una solución:

```cpp
#include <map>
int main(){ map<int,int> m; return m.count(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Crea un std::vector con {31, 2, 18, 8, 30, 46, 46, 6, 8, 7, 29, 22, 35, 39, 1, 28, 33, 22, 18, 23, 13, 24, 3, 6, 32, 48, 6, 37, 42, 20, 47, 5} e imprime size().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{31, 2, 18, 8, 30, 46, 46, 6, 8, 7, 29, 22, 35, 39, 1, 28, 33, 22, 18, 23, 13, 24, 3, 6, 32, 48, 6, 37, 42, 20, 47, 5};
  std::cout << v.size() << "\n";
  return 0;
}
```

vector::size

Aquí tienes una solución:

```cpp
#include <optional>
int main(){ optional<int> o=1; return o; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

With std::vector {31, 2, 18, 8, 30, 46, 46, 6, 8, 7, 29, 22, 35, 39, 1, 28, 33, 22, 18, 23, 13, 24, 3, 6, 32, 48, 6, 37, 42, 20, 47, 5}, print the last element using back().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{31, 2, 18, 8, 30, 46, 46, 6, 8, 7, 29, 22, 35, 39, 1, 28, 33, 22, 18, 23, 13, 24, 3, 6, 32, 48, 6, 37, 42, 20, 47, 5};
  std::cout << v.back() << "\n";
  return 0;
}
```

vector::back

Aquí tienes una solución:

```cpp
int main(){ cout << 1; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Imprime el primer elemento de {31, 2, 18, 8, 30, 46, 46, 6, 8, 7, 29, 22, 35, 39, 1, 28, 33, 22, 18, 23, 13, 24, 3, 6, 32, 48, 6, 37, 42, 20, 47, 5} con front().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{31, 2, 18, 8, 30, 46, 46, 6, 8, 7, 29, 22, 35, 39, 1, 28, 33, 22, 18, 23, 13, 24, 3, 6, 32, 48, 6, 37, 42, 20, 47, 5};
  std::cout << v.front() << "\n";
  return 0;
}
```

vector::front

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ std::vector<int> v{1,2}; reverse(v.begin(),v.end()); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Crea un std::vector con {49, 42, 13, 24, 11, 26, 8, 30, 8, 0, 10, 50, 50, 5, 21, 2, 6, 9, 14, 29, 27, 12, 42, 25, 3, 3, 9, 7, 29, 44, 5, 8, 42} e imprime size().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{49, 42, 13, 24, 11, 26, 8, 30, 8, 0, 10, 50, 50, 5, 21, 2, 6, 9, 14, 29, 27, 12, 42, 25, 3, 3, 9, 7, 29, 44, 5, 8, 42};
  std::cout << v.size() << "\n";
  return 0;
}
```

vector::size

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ auto p=make_unique<int>(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

With std::vector {49, 42, 13, 24, 11, 26, 8, 30, 8, 0, 10, 50, 50, 5, 21, 2, 6, 9, 14, 29, 27, 12, 42, 25, 3, 3, 9, 7, 29, 44, 5, 8, 42}, print the last element using back().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{49, 42, 13, 24, 11, 26, 8, 30, 8, 0, 10, 50, 50, 5, 21, 2, 6, 9, 14, 29, 27, 12, 42, 25, 3, 3, 9, 7, 29, 44, 5, 8, 42};
  std::cout << v.back() << "\n";
  return 0;
}
```

vector::back

Aquí tienes una solución:

```cpp
#include <iostream>
int main(){ std::cout << hola << "\n"; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Imprime el primer elemento de {49, 42, 13, 24, 11, 26, 8, 30, 8, 0, 10, 50, 50, 5, 21, 2, 6, 9, 14, 29, 27, 12, 42, 25, 3, 3, 9, 7, 29, 44, 5, 8, 42} con front().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{49, 42, 13, 24, 11, 26, 8, 30, 8, 0, 10, 50, 50, 5, 21, 2, 6, 9, 14, 29, 27, 12, 42, 25, 3, 3, 9, 7, 29, 44, 5, 8, 42};
  std::cout << v.front() << "\n";
  return 0;
}
```

vector::front

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ vector<int> v; return 0; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Crea un std::vector con {2, 22, 28, 13, 15, 15, 50, 27, 21, 42, 9, 5, 43, 0, 18, 20, 42, 25, 22, 50, 14, 3, 3, 35, 4, 7, 15, 18, 15, 8, 35, 50, 0, 50} e imprime size().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{2, 22, 28, 13, 15, 15, 50, 27, 21, 42, 9, 5, 43, 0, 18, 20, 42, 25, 22, 50, 14, 3, 3, 35, 4, 7, 15, 18, 15, 8, 35, 50, 0, 50};
  std::cout << v.size() << "\n";
  return 0;
}
```

vector::size

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ std::unique_ptr<int> p = new int(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

With std::vector {2, 22, 28, 13, 15, 15, 50, 27, 21, 42, 9, 5, 43, 0, 18, 20, 42, 25, 22, 50, 14, 3, 3, 35, 4, 7, 15, 18, 15, 8, 35, 50, 0, 50}, print the last element using back().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{2, 22, 28, 13, 15, 15, 50, 27, 21, 42, 9, 5, 43, 0, 18, 20, 42, 25, 22, 50, 14, 3, 3, 35, 4, 7, 15, 18, 15, 8, 35, 50, 0, 50};
  std::cout << v.back() << "\n";
  return 0;
}
```

vector::back

Aquí tienes una solución:

```cpp
#include <vector>
#include <numeric>
int main(){ std::vector<int> v{1,2}; auto s=accumulate(v); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Imprime el primer elemento de {2, 22, 28, 13, 15, 15, 50, 27, 21, 42, 9, 5, 43, 0, 18, 20, 42, 25, 22, 50, 14, 3, 3, 35, 4, 7, 15, 18, 15, 8, 35, 50, 0, 50} con front().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{2, 22, 28, 13, 15, 15, 50, 27, 21, 42, 9, 5, 43, 0, 18, 20, 42, 25, 22, 50, 14, 3, 3, 35, 4, 7, 15, 18, 15, 8, 35, 50, 0, 50};
  std::cout << v.front() << "\n";
  return 0;
}
```

vector::front

Aquí tienes una solución:

```cpp
#include <string>
int main(){ string s="a"; return s.size(); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Crea un std::vector con {38, 49, 41, 34, 16, 26, 35, 23, 23, 40, 8, 26, 2, 38, 18, 22, 20, 44, 0, 22, 32, 48, 0, 41, 18, 5, 24, 46, 11, 39, 20, 28, 6, 46, 38} e imprime size().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{38, 49, 41, 34, 16, 26, 35, 23, 23, 40, 8, 26, 2, 38, 18, 22, 20, 44, 0, 22, 32, 48, 0, 41, 18, 5, 24, 46, 11, 39, 20, 28, 6, 46, 38};
  std::cout << v.size() << "\n";
  return 0;
}
```

vector::size

Aquí tienes una solución:

```cpp
#include <map>
int main(){ map<int,int> m; return m.count(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

With std::vector {38, 49, 41, 34, 16, 26, 35, 23, 23, 40, 8, 26, 2, 38, 18, 22, 20, 44, 0, 22, 32, 48, 0, 41, 18, 5, 24, 46, 11, 39, 20, 28, 6, 46, 38}, print the last element using back().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{38, 49, 41, 34, 16, 26, 35, 23, 23, 40, 8, 26, 2, 38, 18, 22, 20, 44, 0, 22, 32, 48, 0, 41, 18, 5, 24, 46, 11, 39, 20, 28, 6, 46, 38};
  std::cout << v.back() << "\n";
  return 0;
}
```

vector::back

Aquí tienes una solución:

```cpp
#include <optional>
int main(){ optional<int> o=1; return o; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Imprime el primer elemento de {38, 49, 41, 34, 16, 26, 35, 23, 23, 40, 8, 26, 2, 38, 18, 22, 20, 44, 0, 22, 32, 48, 0, 41, 18, 5, 24, 46, 11, 39, 20, 28, 6, 46, 38} con front().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{38, 49, 41, 34, 16, 26, 35, 23, 23, 40, 8, 26, 2, 38, 18, 22, 20, 44, 0, 22, 32, 48, 0, 41, 18, 5, 24, 46, 11, 39, 20, 28, 6, 46, 38};
  std::cout << v.front() << "\n";
  return 0;
}
```

vector::front

Aquí tienes una solución:

```cpp
int main(){ cout << 1; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

With std::vector {47, 34, 12, 25, 40, 43, 4, 12, 13, 46, 22, 27, 49, 30, 18, 41, 35, 34, 10, 24, 1, 16, 46, 1, 48, 40, 43, 10, 49, 12, 23, 11, 6, 8, 45, 38}, print the last element using back().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{47, 34, 12, 25, 40, 43, 4, 12, 13, 46, 22, 27, 49, 30, 18, 41, 35, 34, 10, 24, 1, 16, 46, 1, 48, 40, 43, 10, 49, 12, 23, 11, 6, 8, 45, 38};
  std::cout << v.back() << "\n";
  return 0;
}
```

vector::back

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ std::vector<int> v{1,2}; reverse(v.begin(),v.end()); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Imprime el primer elemento de {47, 34, 12, 25, 40, 43, 4, 12, 13, 46, 22, 27, 49, 30, 18, 41, 35, 34, 10, 24, 1, 16, 46, 1, 48, 40, 43, 10, 49, 12, 23, 11, 6, 8, 45, 38} con front().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{47, 34, 12, 25, 40, 43, 4, 12, 13, 46, 22, 27, 49, 30, 18, 41, 35, 34, 10, 24, 1, 16, 46, 1, 48, 40, 43, 10, 49, 12, 23, 11, 6, 8, 45, 38};
  std::cout << v.front() << "\n";
  return 0;
}
```

vector::front

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ auto p=make_unique<int>(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Crea un std::vector con {6, 17, 7, 4, 23, 3, 16, 23, 8, 16, 26, 5, 39, 16, 33, 50, 35, 7, 42, 34, 7, 21, 18, 40, 48, 42, 19, 28, 15, 0, 5, 7, 39, 6, 49, 28, 24} e imprime size().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{6, 17, 7, 4, 23, 3, 16, 23, 8, 16, 26, 5, 39, 16, 33, 50, 35, 7, 42, 34, 7, 21, 18, 40, 48, 42, 19, 28, 15, 0, 5, 7, 39, 6, 49, 28, 24};
  std::cout << v.size() << "\n";
  return 0;
}
```

vector::size

Aquí tienes una solución:

```cpp
#include <iostream>
int main(){ std::cout << hola << "\n"; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

With std::vector {6, 17, 7, 4, 23, 3, 16, 23, 8, 16, 26, 5, 39, 16, 33, 50, 35, 7, 42, 34, 7, 21, 18, 40, 48, 42, 19, 28, 15, 0, 5, 7, 39, 6, 49, 28, 24}, print the last element using back().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{6, 17, 7, 4, 23, 3, 16, 23, 8, 16, 26, 5, 39, 16, 33, 50, 35, 7, 42, 34, 7, 21, 18, 40, 48, 42, 19, 28, 15, 0, 5, 7, 39, 6, 49, 28, 24};
  std::cout << v.back() << "\n";
  return 0;
}
```

vector::back

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ vector<int> v; return 0; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Imprime el primer elemento de {6, 17, 7, 4, 23, 3, 16, 23, 8, 16, 26, 5, 39, 16, 33, 50, 35, 7, 42, 34, 7, 21, 18, 40, 48, 42, 19, 28, 15, 0, 5, 7, 39, 6, 49, 28, 24} con front().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{6, 17, 7, 4, 23, 3, 16, 23, 8, 16, 26, 5, 39, 16, 33, 50, 35, 7, 42, 34, 7, 21, 18, 40, 48, 42, 19, 28, 15, 0, 5, 7, 39, 6, 49, 28, 24};
  std::cout << v.front() << "\n";
  return 0;
}
```

vector::front

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ std::unique_ptr<int> p = new int(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Crea un std::vector con {22, 43, 11, 8, 24, 0, 26, 13, 15, 0, 26, 8, 5, 11, 34, 17, 26, 10, 49, 24, 19, 4, 1, 7, 50, 36, 25, 17, 36, 3, 40, 43, 34, 45, 12, 19, 19, 38} e imprime size().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{22, 43, 11, 8, 24, 0, 26, 13, 15, 0, 26, 8, 5, 11, 34, 17, 26, 10, 49, 24, 19, 4, 1, 7, 50, 36, 25, 17, 36, 3, 40, 43, 34, 45, 12, 19, 19, 38};
  std::cout << v.size() << "\n";
  return 0;
}
```

vector::size

Aquí tienes una solución:

```cpp
#include <vector>
#include <numeric>
int main(){ std::vector<int> v{1,2}; auto s=accumulate(v); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

With std::vector {22, 43, 11, 8, 24, 0, 26, 13, 15, 0, 26, 8, 5, 11, 34, 17, 26, 10, 49, 24, 19, 4, 1, 7, 50, 36, 25, 17, 36, 3, 40, 43, 34, 45, 12, 19, 19, 38}, print the last element using back().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{22, 43, 11, 8, 24, 0, 26, 13, 15, 0, 26, 8, 5, 11, 34, 17, 26, 10, 49, 24, 19, 4, 1, 7, 50, 36, 25, 17, 36, 3, 40, 43, 34, 45, 12, 19, 19, 38};
  std::cout << v.back() << "\n";
  return 0;
}
```

vector::back

Aquí tienes una solución:

```cpp
#include <string>
int main(){ string s="a"; return s.size(); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Imprime el primer elemento de {22, 43, 11, 8, 24, 0, 26, 13, 15, 0, 26, 8, 5, 11, 34, 17, 26, 10, 49, 24, 19, 4, 1, 7, 50, 36, 25, 17, 36, 3, 40, 43, 34, 45, 12, 19, 19, 38} con front().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{22, 43, 11, 8, 24, 0, 26, 13, 15, 0, 26, 8, 5, 11, 34, 17, 26, 10, 49, 24, 19, 4, 1, 7, 50, 36, 25, 17, 36, 3, 40, 43, 34, 45, 12, 19, 19, 38};
  std::cout << v.front() << "\n";
  return 0;
}
```

vector::front

Aquí tienes una solución:

```cpp
#include <map>
int main(){ map<int,int> m; return m.count(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Crea un std::vector con {35, 50, 42, 21, 1, 42, 9, 19, 18, 12, 27, 13, 31, 2, 27, 4, 9, 10, 42, 3, 35, 14, 4, 28, 37, 12, 25, 36, 45, 27, 45, 34, 23, 4, 13, 5, 28, 2, 34} e imprime size().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{35, 50, 42, 21, 1, 42, 9, 19, 18, 12, 27, 13, 31, 2, 27, 4, 9, 10, 42, 3, 35, 14, 4, 28, 37, 12, 25, 36, 45, 27, 45, 34, 23, 4, 13, 5, 28, 2, 34};
  std::cout << v.size() << "\n";
  return 0;
}
```

vector::size

Aquí tienes una solución:

```cpp
#include <optional>
int main(){ optional<int> o=1; return o; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

With std::vector {35, 50, 42, 21, 1, 42, 9, 19, 18, 12, 27, 13, 31, 2, 27, 4, 9, 10, 42, 3, 35, 14, 4, 28, 37, 12, 25, 36, 45, 27, 45, 34, 23, 4, 13, 5, 28, 2, 34}, print the last element using back().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{35, 50, 42, 21, 1, 42, 9, 19, 18, 12, 27, 13, 31, 2, 27, 4, 9, 10, 42, 3, 35, 14, 4, 28, 37, 12, 25, 36, 45, 27, 45, 34, 23, 4, 13, 5, 28, 2, 34};
  std::cout << v.back() << "\n";
  return 0;
}
```

vector::back

Aquí tienes una solución:

```cpp
int main(){ cout << 1; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Imprime el primer elemento de {35, 50, 42, 21, 1, 42, 9, 19, 18, 12, 27, 13, 31, 2, 27, 4, 9, 10, 42, 3, 35, 14, 4, 28, 37, 12, 25, 36, 45, 27, 45, 34, 23, 4, 13, 5, 28, 2, 34} con front().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{35, 50, 42, 21, 1, 42, 9, 19, 18, 12, 27, 13, 31, 2, 27, 4, 9, 10, 42, 3, 35, 14, 4, 28, 37, 12, 25, 36, 45, 27, 45, 34, 23, 4, 13, 5, 28, 2, 34};
  std::cout << v.front() << "\n";
  return 0;
}
```

vector::front

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ std::vector<int> v{1,2}; reverse(v.begin(),v.end()); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Crea un std::vector con {19, 44, 1, 13, 43, 2, 9, 41, 33, 6, 45, 3, 26, 46, 30, 39, 24, 21, 42, 11, 41, 42, 25, 27, 42, 43, 6, 5, 2, 13, 9, 42, 41, 8, 50, 45, 42, 37, 19, 23} e imprime size().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{19, 44, 1, 13, 43, 2, 9, 41, 33, 6, 45, 3, 26, 46, 30, 39, 24, 21, 42, 11, 41, 42, 25, 27, 42, 43, 6, 5, 2, 13, 9, 42, 41, 8, 50, 45, 42, 37, 19, 23};
  std::cout << v.size() << "\n";
  return 0;
}
```

vector::size

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ auto p=make_unique<int>(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

With std::vector {19, 44, 1, 13, 43, 2, 9, 41, 33, 6, 45, 3, 26, 46, 30, 39, 24, 21, 42, 11, 41, 42, 25, 27, 42, 43, 6, 5, 2, 13, 9, 42, 41, 8, 50, 45, 42, 37, 19, 23}, print the last element using back().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{19, 44, 1, 13, 43, 2, 9, 41, 33, 6, 45, 3, 26, 46, 30, 39, 24, 21, 42, 11, 41, 42, 25, 27, 42, 43, 6, 5, 2, 13, 9, 42, 41, 8, 50, 45, 42, 37, 19, 23};
  std::cout << v.back() << "\n";
  return 0;
}
```

vector::back

Aquí tienes una solución:

```cpp
#include <iostream>
int main(){ std::cout << hola << "\n"; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Imprime el primer elemento de {19, 44, 1, 13, 43, 2, 9, 41, 33, 6, 45, 3, 26, 46, 30, 39, 24, 21, 42, 11, 41, 42, 25, 27, 42, 43, 6, 5, 2, 13, 9, 42, 41, 8, 50, 45, 42, 37, 19, 23} con front().

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v{19, 44, 1, 13, 43, 2, 9, 41, 33, 6, 45, 3, 26, 46, 30, 39, 24, 21, 42, 11, 41, 42, 25, 27, 42, 43, 6, 5, 2, 13, 9, 42, 41, 8, 50, 45, 42, 37, 19, 23};
  std::cout << v.front() << "\n";
  return 0;
}
```

vector::front

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ vector<int> v; return 0; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Usa push_back para insertar [1, 2, 3] e imprime el tamaño.

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v;
  v.push_back(1);
  v.push_back(2);
  v.push_back(3);
  std::cout << v.size() << "\n";
  return 0;
}
```

push_back + size

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ std::unique_ptr<int> p = new int(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Usa push_back para insertar [9] e imprime el tamaño.

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v;
  v.push_back(9);
  std::cout << v.size() << "\n";
  return 0;
}
```

push_back + size

Aquí tienes una solución:

```cpp
#include <vector>
#include <numeric>
int main(){ std::vector<int> v{1,2}; auto s=accumulate(v); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Usa push_back para insertar [4, 5] e imprime el tamaño.

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v;
  v.push_back(4);
  v.push_back(5);
  std::cout << v.size() << "\n";
  return 0;
}
```

push_back + size

Aquí tienes una solución:

```cpp
#include <string>
int main(){ string s="a"; return s.size(); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Usa push_back para insertar [8, 1, 7, 2] e imprime el tamaño.

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v;
  v.push_back(8);
  v.push_back(1);
  v.push_back(7);
  v.push_back(2);
  std::cout << v.size() << "\n";
  return 0;
}
```

push_back + size

Aquí tienes una solución:

```cpp
#include <map>
int main(){ map<int,int> m; return m.count(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Usa push_back para insertar [0, 0, 1] e imprime el tamaño.

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v;
  v.push_back(0);
  v.push_back(0);
  v.push_back(1);
  std::cout << v.size() << "\n";
  return 0;
}
```

push_back + size

Aquí tienes una solución:

```cpp
#include <optional>
int main(){ optional<int> o=1; return o; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Usa push_back para insertar [10, 20, 30, 40] e imprime el tamaño.

```cpp
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v;
  v.push_back(10);
  v.push_back(20);
  v.push_back(30);
  v.push_back(40);
  std::cout << v.size() << "\n";
  return 0;
}
```

push_back + size

Aquí tienes una solución:

```cpp
int main(){ cout << 1; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Con std::string guarda "abc" e imprime length/size.

```cpp
#include <iostream>
#include <string>
int main(){
  std::string s="abc";
  std::cout << s.size() << "\n";
  return 0;
}
```

string::size

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ std::vector<int> v{1,2}; reverse(v.begin(),v.end()); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Print first 3 chars of "abc" using substr.

```cpp
#include <iostream>
#include <string>
int main(){
  std::string s="abc";
  std::cout << s.substr(0,3) << "\n";
  return 0;
}
```

string::substr

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ auto p=make_unique<int>(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Con std::string guarda "hola" e imprime length/size.

```cpp
#include <iostream>
#include <string>
int main(){
  std::string s="hola";
  std::cout << s.size() << "\n";
  return 0;
}
```

string::size

Aquí tienes una solución:

```cpp
#include <iostream>
int main(){ std::cout << hola << "\n"; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Print first 3 chars of "hola" using substr.

```cpp
#include <iostream>
#include <string>
int main(){
  std::string s="hola";
  std::cout << s.substr(0,3) << "\n";
  return 0;
}
```

string::substr

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ vector<int> v; return 0; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Con std::string guarda "cplusplus" e imprime length/size.

```cpp
#include <iostream>
#include <string>
int main(){
  std::string s="cplusplus";
  std::cout << s.size() << "\n";
  return 0;
}
```

string::size

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ std::unique_ptr<int> p = new int(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Print first 3 chars of "cplusplus" using substr.

```cpp
#include <iostream>
#include <string>
int main(){
  std::string s="cplusplus";
  std::cout << s.substr(0,3) << "\n";
  return 0;
}
```

string::substr

Aquí tienes una solución:

```cpp
#include <vector>
#include <numeric>
int main(){ std::vector<int> v{1,2}; auto s=accumulate(v); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Con std::string guarda "vector" e imprime length/size.

```cpp
#include <iostream>
#include <string>
int main(){
  std::string s="vector";
  std::cout << s.size() << "\n";
  return 0;
}
```

string::size

Aquí tienes una solución:

```cpp
#include <string>
int main(){ string s="a"; return s.size(); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Print first 3 chars of "vector" using substr.

```cpp
#include <iostream>
#include <string>
int main(){
  std::string s="vector";
  std::cout << s.substr(0,3) << "\n";
  return 0;
}
```

string::substr

Aquí tienes una solución:

```cpp
#include <map>
int main(){ map<int,int> m; return m.count(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Print first 3 chars of "map" using substr.

```cpp
#include <iostream>
#include <string>
int main(){
  std::string s="map";
  std::cout << s.substr(0,3) << "\n";
  return 0;
}
```

string::substr

Aquí tienes una solución:

```cpp
#include <optional>
int main(){ optional<int> o=1; return o; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Con std::string guarda "optional" e imprime length/size.

```cpp
#include <iostream>
#include <string>
int main(){
  std::string s="optional";
  std::cout << s.size() << "\n";
  return 0;
}
```

string::size

Aquí tienes una solución:

```cpp
int main(){ cout << 1; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Print first 3 chars of "optional" using substr.

```cpp
#include <iostream>
#include <string>
int main(){
  std::string s="optional";
  std::cout << s.substr(0,3) << "\n";
  return 0;
}
```

string::substr

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ std::vector<int> v{1,2}; reverse(v.begin(),v.end()); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Con std::string guarda "unique" e imprime length/size.

```cpp
#include <iostream>
#include <string>
int main(){
  std::string s="unique";
  std::cout << s.size() << "\n";
  return 0;
}
```

string::size

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ auto p=make_unique<int>(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Print first 3 chars of "unique" using substr.

```cpp
#include <iostream>
#include <string>
int main(){
  std::string s="unique";
  std::cout << s.substr(0,3) << "\n";
  return 0;
}
```

string::substr

Aquí tienes una solución:

```cpp
#include <iostream>
int main(){ std::cout << hola << "\n"; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Con std::string guarda "train" e imprime length/size.

```cpp
#include <iostream>
#include <string>
int main(){
  std::string s="train";
  std::cout << s.size() << "\n";
  return 0;
}
```

string::size

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ vector<int> v; return 0; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Print first 3 chars of "train" using substr.

```cpp
#include <iostream>
#include <string>
int main(){
  std::string s="train";
  std::cout << s.substr(0,3) << "\n";
  return 0;
}
```

string::substr

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ std::unique_ptr<int> p = new int(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Con std::string guarda "model" e imprime length/size.

```cpp
#include <iostream>
#include <string>
int main(){
  std::string s="model";
  std::cout << s.size() << "\n";
  return 0;
}
```

string::size

Aquí tienes una solución:

```cpp
#include <vector>
#include <numeric>
int main(){ std::vector<int> v{1,2}; auto s=accumulate(v); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Print first 3 chars of "model" using substr.

```cpp
#include <iostream>
#include <string>
int main(){
  std::string s="model";
  std::cout << s.substr(0,3) << "\n";
  return 0;
}
```

string::substr

Aquí tienes una solución:

```cpp
#include <string>
int main(){ string s="a"; return s.size(); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Print first 3 chars of "judge" using substr.

```cpp
#include <iostream>
#include <string>
int main(){
  std::string s="judge";
  std::cout << s.substr(0,3) << "\n";
  return 0;
}
```

string::substr

Aquí tienes una solución:

```cpp
#include <map>
int main(){ map<int,int> m; return m.count(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Crea map string->int y muestra count("a").

```cpp
#include <iostream>
#include <map>
#include <string>
int main(){
  std::map<std::string,int> m{{{"a", 1}, {"b", 2}}};
  std::cout << m.count("a") << "\n";
  return 0;
}
```

map::count

Aquí tienes una solución:

```cpp
#include <optional>
int main(){ optional<int> o=1; return o; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Crea map string->int y muestra count("x").

```cpp
#include <iostream>
#include <map>
#include <string>
int main(){
  std::map<std::string,int> m{{{"x", 9}, {"y", 8}}};
  std::cout << m.count("x") << "\n";
  return 0;
}
```

map::count

Aquí tienes una solución:

```cpp
int main(){ cout << 1; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Crea map string->int y muestra count("k").

```cpp
#include <iostream>
#include <map>
#include <string>
int main(){
  std::map<std::string,int> m{{{"k", 3}}};
  std::cout << m.count("k") << "\n";
  return 0;
}
```

map::count

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ std::vector<int> v{1,2}; reverse(v.begin(),v.end()); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {16, 27, 21, 29, 17, 2, 27} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{16, 27, 21, 29, 17, 2, 27};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ auto p=make_unique<int>(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {28, 18, 19} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{28, 18, 19};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <iostream>
int main(){ std::cout << hola << "\n"; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {4, 16, 24, 19, 30, 21, 19, 3} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{4, 16, 24, 19, 30, 21, 19, 3};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ vector<int> v; return 0; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {29, 20, 7, 20, 25, 26} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{29, 20, 7, 20, 25, 26};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ std::unique_ptr<int> p = new int(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {15, 0, 11, 9, 25, 24, 14} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{15, 0, 11, 9, 25, 24, 14};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <vector>
#include <numeric>
int main(){ std::vector<int> v{1,2}; auto s=accumulate(v); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {20, 23, 9, 26, 17} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{20, 23, 9, 26, 17};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <string>
int main(){ string s="a"; return s.size(); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {1, 18, 3, 15, 25} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{1, 18, 3, 15, 25};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <map>
int main(){ map<int,int> m; return m.count(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {24, 13, 21, 5, 28} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{24, 13, 21, 5, 28};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <optional>
int main(){ optional<int> o=1; return o; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {21, 19, 2} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{21, 19, 2};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
int main(){ cout << 1; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {18, 12, 4, 16} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{18, 12, 4, 16};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ std::vector<int> v{1,2}; reverse(v.begin(),v.end()); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {22, 3, 24, 29, 15, 29, 16, 24} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{22, 3, 24, 29, 15, 29, 16, 24};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ auto p=make_unique<int>(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {28, 20, 25, 16} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{28, 20, 25, 16};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <iostream>
int main(){ std::cout << hola << "\n"; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {25, 28, 28, 24, 20, 8} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{25, 28, 28, 24, 20, 8};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ vector<int> v; return 0; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {21, 15, 5, 7, 3} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{21, 15, 5, 7, 3};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ std::unique_ptr<int> p = new int(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {22, 26, 1, 22, 16, 22, 24, 4} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{22, 26, 1, 22, 16, 22, 24, 4};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <vector>
#include <numeric>
int main(){ std::vector<int> v{1,2}; auto s=accumulate(v); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {29, 1, 4, 4, 25} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{29, 1, 4, 4, 25};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <string>
int main(){ string s="a"; return s.size(); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {5, 21, 21, 12, 23, 25, 5, 24} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{5, 21, 21, 12, 23, 25, 5, 24};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <map>
int main(){ map<int,int> m; return m.count(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {28, 7, 16, 30, 20, 5, 24} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{28, 7, 16, 30, 20, 5, 24};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <optional>
int main(){ optional<int> o=1; return o; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {21, 16, 20, 14, 7} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{21, 16, 20, 14, 7};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
int main(){ cout << 1; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {13, 23, 27} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{13, 23, 27};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ std::vector<int> v{1,2}; reverse(v.begin(),v.end()); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {12, 10, 1, 20, 13, 27} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{12, 10, 1, 20, 13, 27};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ auto p=make_unique<int>(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {22, 2, 10, 14, 14, 0} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{22, 2, 10, 14, 14, 0};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <iostream>
int main(){ std::cout << hola << "\n"; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {1, 22, 11} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{1, 22, 11};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ vector<int> v; return 0; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {10, 24, 7, 22, 17} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{10, 24, 7, 22, 17};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ std::unique_ptr<int> p = new int(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {10, 21, 7, 1, 5, 4, 20, 14} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{10, 21, 7, 1, 5, 4, 20, 14};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <vector>
#include <numeric>
int main(){ std::vector<int> v{1,2}; auto s=accumulate(v); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {26, 21, 26, 15} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{26, 21, 26, 15};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <string>
int main(){ string s="a"; return s.size(); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {20, 26, 0, 11, 30, 20} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{20, 26, 0, 11, 30, 20};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <map>
int main(){ map<int,int> m; return m.count(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {8, 30, 29, 11} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{8, 30, 29, 11};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <optional>
int main(){ optional<int> o=1; return o; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {9, 21, 2, 11, 6, 25, 1} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{9, 21, 2, 11, 6, 25, 1};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
int main(){ cout << 1; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {17, 4, 16} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{17, 4, 16};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ std::vector<int> v{1,2}; reverse(v.begin(),v.end()); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {12, 22, 15, 2, 25, 6} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{12, 22, 15, 2, 25, 6};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ auto p=make_unique<int>(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {11, 7, 10, 22} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{11, 7, 10, 22};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <iostream>
int main(){ std::cout << hola << "\n"; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {23, 15, 3, 12, 2, 11} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{23, 15, 3, 12, 2, 11};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ vector<int> v; return 0; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {30, 12, 3, 6, 8, 2, 22} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{30, 12, 3, 6, 8, 2, 22};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ std::unique_ptr<int> p = new int(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {11, 5, 6} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{11, 5, 6};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <vector>
#include <numeric>
int main(){ std::vector<int> v{1,2}; auto s=accumulate(v); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {27, 2, 13} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{27, 2, 13};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <string>
int main(){ string s="a"; return s.size(); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {1, 13, 1, 3, 29, 9, 30, 16} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{1, 13, 1, 3, 29, 9, 30, 16};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <map>
int main(){ map<int,int> m; return m.count(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {12, 26, 27, 23, 10, 11} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{12, 26, 27, 23, 10, 11};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <optional>
int main(){ optional<int> o=1; return o; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {2, 10, 19, 5, 3} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{2, 10, 19, 5, 3};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
int main(){ cout << 1; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {14, 12, 16} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{14, 12, 16};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ std::vector<int> v{1,2}; reverse(v.begin(),v.end()); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {1, 26, 6, 25, 9} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{1, 26, 6, 25, 9};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ auto p=make_unique<int>(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {22, 9, 4, 10, 19} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{22, 9, 4, 10, 19};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <iostream>
int main(){ std::cout << hola << "\n"; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {15, 26, 4, 6, 10, 7, 22} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{15, 26, 4, 6, 10, 7, 22};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ vector<int> v; return 0; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {17, 7, 27, 9, 29, 24} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{17, 7, 27, 9, 29, 24};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ std::unique_ptr<int> p = new int(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {6, 14, 15, 25} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{6, 14, 15, 25};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <vector>
#include <numeric>
int main(){ std::vector<int> v{1,2}; auto s=accumulate(v); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {15, 20, 14, 14, 25} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{15, 20, 14, 14, 25};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <string>
int main(){ string s="a"; return s.size(); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {13, 23, 29, 9, 2} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{13, 23, 29, 9, 2};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <map>
int main(){ map<int,int> m; return m.count(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {12, 27, 14, 3, 29, 27, 19, 27} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{12, 27, 14, 3, 29, 27, 19, 27};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <optional>
int main(){ optional<int> o=1; return o; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {7, 24, 1, 5} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{7, 24, 1, 5};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
int main(){ cout << 1; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Ordena {13, 25, 16, 14, 21, 19, 8, 19} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{13, 25, 16, 14, 21, 19, 8, 19};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ std::vector<int> v{1,2}; reverse(v.begin(),v.end()); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Ordena {24, 9, 5, 29} con std::sort e imprime separados por espacio.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{24, 9, 5, 29};
  std::sort(v.begin(), v.end());
  for(size_t i=0;i<v.size();++i){ if(i) std::cout<<' '; std::cout<<v[i]; }
  std::cout<<"\n"; return 0;
}
```

std::sort

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ auto p=make_unique<int>(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 999 is in {16, 7, 13, 2, 18, 12}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{16, 7, 13, 2, 18, 12};
  auto it=std::find(v.begin(), v.end(), 999);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <iostream>
int main(){ std::cout << hola << "\n"; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 2 is in {17, 2, 11, 14, 20, 4}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{17, 2, 11, 14, 20, 4};
  auto it=std::find(v.begin(), v.end(), 2);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ vector<int> v; return 0; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 18 is in {11, 18, 4, 4, 9, 13}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{11, 18, 4, 4, 9, 13};
  auto it=std::find(v.begin(), v.end(), 18);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ std::unique_ptr<int> p = new int(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 999 is in {5, 14, 8, 19, 7, 19}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{5, 14, 8, 19, 7, 19};
  auto it=std::find(v.begin(), v.end(), 999);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <vector>
#include <numeric>
int main(){ std::vector<int> v{1,2}; auto s=accumulate(v); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 6 is in {6, 9, 6, 18, 19, 1}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{6, 9, 6, 18, 19, 1};
  auto it=std::find(v.begin(), v.end(), 6);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <string>
int main(){ string s="a"; return s.size(); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 14 is in {6, 19, 14, 0, 5, 5}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{6, 19, 14, 0, 5, 5};
  auto it=std::find(v.begin(), v.end(), 14);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <map>
int main(){ map<int,int> m; return m.count(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 999 is in {19, 5, 10, 1, 3, 7}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{19, 5, 10, 1, 3, 7};
  auto it=std::find(v.begin(), v.end(), 999);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <optional>
int main(){ optional<int> o=1; return o; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 2 is in {1, 11, 6, 2, 5, 14}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{1, 11, 6, 2, 5, 14};
  auto it=std::find(v.begin(), v.end(), 2);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
int main(){ cout << 1; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 19 is in {5, 3, 17, 16, 1, 19}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{5, 3, 17, 16, 1, 19};
  auto it=std::find(v.begin(), v.end(), 19);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ std::vector<int> v{1,2}; reverse(v.begin(),v.end()); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 999 is in {7, 20, 3, 13, 4, 7}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{7, 20, 3, 13, 4, 7};
  auto it=std::find(v.begin(), v.end(), 999);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ auto p=make_unique<int>(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 11 is in {9, 5, 14, 4, 18, 11}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{9, 5, 14, 4, 18, 11};
  auto it=std::find(v.begin(), v.end(), 11);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <iostream>
int main(){ std::cout << hola << "\n"; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 15 is in {12, 0, 19, 15, 9, 13}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{12, 0, 19, 15, 9, 13};
  auto it=std::find(v.begin(), v.end(), 15);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ vector<int> v; return 0; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 999 is in {19, 5, 18, 4, 6, 7}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{19, 5, 18, 4, 6, 7};
  auto it=std::find(v.begin(), v.end(), 999);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ std::unique_ptr<int> p = new int(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 14 is in {9, 14, 16, 4, 18, 6}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{9, 14, 16, 4, 18, 6};
  auto it=std::find(v.begin(), v.end(), 14);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <vector>
#include <numeric>
int main(){ std::vector<int> v{1,2}; auto s=accumulate(v); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 7 is in {16, 5, 7, 15, 3, 3}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{16, 5, 7, 15, 3, 3};
  auto it=std::find(v.begin(), v.end(), 7);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <string>
int main(){ string s="a"; return s.size(); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 999 is in {20, 5, 0, 15, 20, 12}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{20, 5, 0, 15, 20, 12};
  auto it=std::find(v.begin(), v.end(), 999);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <map>
int main(){ map<int,int> m; return m.count(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 13 is in {7, 17, 20, 7, 19, 13}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{7, 17, 20, 7, 19, 13};
  auto it=std::find(v.begin(), v.end(), 13);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <optional>
int main(){ optional<int> o=1; return o; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 8 is in {2, 8, 8, 17, 9, 8}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{2, 8, 8, 17, 9, 8};
  auto it=std::find(v.begin(), v.end(), 8);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
int main(){ cout << 1; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 999 is in {4, 19, 6, 6, 0, 2}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{4, 19, 6, 6, 0, 2};
  auto it=std::find(v.begin(), v.end(), 999);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ std::vector<int> v{1,2}; reverse(v.begin(),v.end()); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 15 is in {13, 16, 9, 15, 2, 5}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{13, 16, 9, 15, 2, 5};
  auto it=std::find(v.begin(), v.end(), 15);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ auto p=make_unique<int>(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 10 is in {10, 16, 2, 13, 17, 9}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{10, 16, 2, 13, 17, 9};
  auto it=std::find(v.begin(), v.end(), 10);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <iostream>
int main(){ std::cout << hola << "\n"; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 999 is in {14, 20, 0, 4, 8, 10}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{14, 20, 0, 4, 8, 10};
  auto it=std::find(v.begin(), v.end(), 999);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ vector<int> v; return 0; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 9 is in {4, 14, 14, 9, 3, 15}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{4, 14, 14, 9, 3, 15};
  auto it=std::find(v.begin(), v.end(), 9);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ std::unique_ptr<int> p = new int(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 3 is in {11, 11, 3, 7, 11, 8}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{11, 11, 3, 7, 11, 8};
  auto it=std::find(v.begin(), v.end(), 3);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <vector>
#include <numeric>
int main(){ std::vector<int> v{1,2}; auto s=accumulate(v); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 999 is in {18, 16, 2, 3, 0, 20}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{18, 16, 2, 3, 0, 20};
  auto it=std::find(v.begin(), v.end(), 999);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <string>
int main(){ string s="a"; return s.size(); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 11 is in {11, 11, 14, 14, 12, 4}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{11, 11, 14, 14, 12, 4};
  auto it=std::find(v.begin(), v.end(), 11);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <map>
int main(){ map<int,int> m; return m.count(1); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 5 is in {7, 5, 20, 10, 6, 14}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{7, 5, 20, 10, 6, 14};
  auto it=std::find(v.begin(), v.end(), 5);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <optional>
int main(){ optional<int> o=1; return o; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 999 is in {17, 7, 13, 11, 12, 5}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{17, 7, 13, 11, 12, 5};
  auto it=std::find(v.begin(), v.end(), 999);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
int main(){ cout << 1; }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 13 is in {8, 18, 11, 12, 17, 13}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{8, 18, 11, 12, 17, 13};
  auto it=std::find(v.begin(), v.end(), 13);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ std::vector<int> v{1,2}; reverse(v.begin(),v.end()); }
```


You are an assistant that only programs in modern C++ (C++20). Reply with a short explanation and one complete compilable ```cpp``` code block.

Use std::find to check if 0 is in {20, 0, 7, 15, 7, 19}; print found/missing.

```cpp
#include <iostream>
#include <vector>
#include <algorithm>
int main(){
  std::vector<int> v{20, 0, 7, 15, 7, 19};
  auto it=std::find(v.begin(), v.end(), 0);
  std::cout << (it!=v.end()?"found":"missing") << "\n";
  return 0;
}
```

std::find

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ auto p=make_unique<int>(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Suma {1, 2, 3, 4} con std::accumulate e imprime el total.

```cpp
#include <iostream>
#include <vector>
#include <numeric>
int main(){
  std::vector<int> v{1, 2, 3, 4};
  int s=std::accumulate(v.begin(), v.end(), 0);
  std::cout << s << "\n";
  return 0;
}
```

std::accumulate

Aquí tienes una solución:

```cpp
#include <iostream>
int main(){ std::cout << hola << "\n"; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Suma {5, 5, 5} con std::accumulate e imprime el total.

```cpp
#include <iostream>
#include <vector>
#include <numeric>
int main(){
  std::vector<int> v{5, 5, 5};
  int s=std::accumulate(v.begin(), v.end(), 0);
  std::cout << s << "\n";
  return 0;
}
```

std::accumulate

Aquí tienes una solución:

```cpp
#include <vector>
int main(){ vector<int> v; return 0; }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Suma {10, -3, 2} con std::accumulate e imprime el total.

```cpp
#include <iostream>
#include <vector>
#include <numeric>
int main(){
  std::vector<int> v{10, -3, 2};
  int s=std::accumulate(v.begin(), v.end(), 0);
  std::cout << s << "\n";
  return 0;
}
```

std::accumulate

Aquí tienes una solución:

```cpp
#include <memory>
int main(){ std::unique_ptr<int> p = new int(1); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Suma {1, 1, 1, 1} con std::accumulate e imprime el total.

```cpp
#include <iostream>
#include <vector>
#include <numeric>
int main(){
  std::vector<int> v{1, 1, 1, 1};
  int s=std::accumulate(v.begin(), v.end(), 0);
  std::cout << s << "\n";
  return 0;
}
```

std::accumulate

Aquí tienes una solución:

```cpp
#include <vector>
#include <numeric>
int main(){ std::vector<int> v{1,2}; auto s=accumulate(v); }
```


Eres un asistente que solo programa en C++ moderno (C++20). Responde con una breve explicación y un único bloque de código ```cpp``` completo y compilable.

Suma {9, 8, 7} con std::accumulate e imprime el total.

```cpp
#include <iostream>
#include <vector>
#include <numeric>
int main(){
  std::vector<int> v{9, 8, 7};
  int s=std::accumulate(v.begin(), v.end(), 0);
  std::cout << s << "\n";
  return 0;
}
```

std::accumulate

Aquí tienes una solución:

```cpp
#include <string>
int main(){ string s="a"; return s.size(); }
```