{"base_canonical_solution": "\ntemplate <typename T>\nbool has_close_elements(T numbers, float threshold) {\n  for (int i = 0; i < numbers.size(); i++)\n    for (int j = i + 1; j < numbers.size(); j++)\n      if (std::abs(numbers[i] - numbers[j]) < threshold)\n        return true;\n\n  return false;\n}\n", "base_prompt": "Make the following function generic for the parameter `numbers`.", "concepts_canonical_solution": "\ntemplate <typename T>\n  requires std::same_as<typename T::value_type, float>\nbool has_close_elements(T numbers, float threshold) {\n  for (int i = 0; i < numbers.size(); i++)\n    for (int j = i + 1; j < numbers.size(); j++)\n      if (std::abs(numbers[i] - numbers[j]) < threshold)\n        return true;\n\n  return false;\n}\n", "concepts_prompt": "Constrain the generic code using C++20 Concepts so that it accepts a container with value type of floats.", "invalids": "\nint main() {\n  std::string s{};\n  has_close_elements(s, 3.4);\n}\n", "sfinae_canonical_solution": "\ntemplate <\n    typename T,\n    std::enable_if_t<std::is_same_v<typename T::value_type, float>, int> = 0>\nbool has_close_elements(T numbers, float threshold) {\n  for (int i = 0; i < numbers.size(); i++)\n    for (int j = i + 1; j < numbers.size(); j++)\n      if (std::abs(numbers[i] - numbers[j]) < threshold)\n        return true;\n\n  return false;\n}\n", "sfinae_prompt": "Constrain the generic code using C++17 SFINAE so that it accepts a container with value type of floats.", "starter_code": "\nbool has_close_elements(std::vector<float> numbers, float threshold) {\n  for (int i = 0; i < numbers.size(); i++)\n    for (int j = i + 1; j < numbers.size(); j++)\n      if (std::abs(numbers[i] - numbers[j]) < threshold)\n        return true;\n\n  return false;\n}\n", "task_id": "HEP/0", "tests": "\n#define ASSERT(...)                                                            \\\n  do {                                                                         \\\n    if (!(__VA_ARGS__)) {                                                      \\\n      std::exit(-1);                                                           \\\n    }                                                                          \\\n  } while (false)\n\n#define TEST_ON_TYPE(_type_)                                                   \\\n  do {                                                                         \\\n    _type_ a = {1.0, 2.0, 3.9, 4.0, 5.0, 2.2};                                 \\\n    ASSERT(has_close_elements(a, 0.3) == true);                                \\\n    ASSERT(has_close_elements(a, 0.05) == false);                              \\\n    ASSERT(has_close_elements(_type_{1.0, 2.0, 5.9, 4.0, 5.0}, 0.95) == true); \\\n    ASSERT(has_close_elements(_type_{1.0, 2.0, 5.9, 4.0, 5.0}, 0.8) == false); \\\n    ASSERT(has_close_elements(_type_{1.0, 2.0, 3.0, 4.0, 5.0}, 2.0) == true);  \\\n    ASSERT(has_close_elements(_type_{1.1, 2.2, 3.1, 4.1, 5.1}, 1.0) == true);  \\\n    ASSERT(has_close_elements(_type_{1.1, 2.2, 3.1, 4.1, 5.1}, 0.5) == false); \\\n  } while (false)\n\nint main() {\n  TEST_ON_TYPE(std::vector<float>);\n  TEST_ON_TYPE(std::deque<float>);\n}\n"}