message stringlengths 2 49.9k | message_type stringclasses 2
values | message_id int64 0 1 | conversation_id int64 446 108k | cluster float64 13 13 | __index_level_0__ int64 892 217k |
|---|---|---|---|---|---|
Provide a correct Python 3 solution for this coding contest problem.
AtCoDeer the deer wants a directed graph that satisfies the following conditions:
* The number of vertices, N, is at most 300.
* There must not be self-loops or multiple edges.
* The vertices are numbered from 1 through N.
* Each edge has either an ... | instruction | 0 | 21,018 | 13 | 42,036 |
"Correct Solution:
```
# seishin.py
A, B = map(int, input().split())
D = [list(map(int, input().split())) for i in range(A)]
N = 101
F = [[0]*N for i in range(N)]
for a in range(N):
for b in range(N):
res = 0
for x in range(A):
for y in range(B):
res = max(res, D[x][y] -... | output | 1 | 21,018 | 13 | 42,037 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
AtCoDeer the deer wants a directed graph that satisfies the following conditions:
* The number of vertices, N, is at most 300.
* There must not be self-loops or multiple edges.
* The vertices a... | instruction | 0 | 21,019 | 13 | 42,038 |
No | output | 1 | 21,019 | 13 | 42,039 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
AtCoDeer the deer wants a directed graph that satisfies the following conditions:
* The number of vertices, N, is at most 300.
* There must not be self-loops or multiple edges.
* The vertices a... | instruction | 0 | 21,020 | 13 | 42,040 |
No | output | 1 | 21,020 | 13 | 42,041 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
AtCoDeer the deer wants a directed graph that satisfies the following conditions:
* The number of vertices, N, is at most 300.
* There must not be self-loops or multiple edges.
* The vertices a... | instruction | 0 | 21,021 | 13 | 42,042 |
No | output | 1 | 21,021 | 13 | 42,043 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
AtCoDeer the deer wants a directed graph that satisfies the following conditions:
* The number of vertices, N, is at most 300.
* There must not be self-loops or multiple edges.
* The vertices a... | instruction | 0 | 21,022 | 13 | 42,044 |
No | output | 1 | 21,022 | 13 | 42,045 |
Provide a correct Python 3 solution for this coding contest problem.
We have a tree with N vertices. The vertices are numbered 1, 2, ..., N. The i-th (1 ≦ i ≦ N - 1) edge connects the two vertices A_i and B_i.
Takahashi wrote integers into K of the vertices. Specifically, for each 1 ≦ j ≦ K, he wrote the integer P_j ... | instruction | 0 | 21,050 | 13 | 42,100 |
"Correct Solution:
```
import sys
sys.setrecursionlimit(500000)
N = int(input())
E = [[] for _ in range(N+1)]
for _ in range(N-1):
a, b = map(int, input().split())
E[a].append(b)
E[b].append(a)
K = int(input())
L = [-float("inf")] * (N+1)
R = [float("inf")] * (N+1)
for _ in range(K):
v, p = map(int, in... | output | 1 | 21,050 | 13 | 42,101 |
Provide a correct Python 3 solution for this coding contest problem.
We have a tree with N vertices. The vertices are numbered 1, 2, ..., N. The i-th (1 ≦ i ≦ N - 1) edge connects the two vertices A_i and B_i.
Takahashi wrote integers into K of the vertices. Specifically, for each 1 ≦ j ≦ K, he wrote the integer P_j ... | instruction | 0 | 21,051 | 13 | 42,102 |
"Correct Solution:
```
def N(): return int(input())
def NM():return map(int,input().split())
def L():return list(NM())
def LN(n):return [N() for i in range(n)]
def LL(n):return [L() for i in range(n)]
n=N()
edge=[[] for i in range(n+1)]
for i in range(n-1):
a,b=map(int,input().split())
edge[a].append(b)
edg... | output | 1 | 21,051 | 13 | 42,103 |
Provide a correct Python 3 solution for this coding contest problem.
We have a tree with N vertices. The vertices are numbered 1, 2, ..., N. The i-th (1 ≦ i ≦ N - 1) edge connects the two vertices A_i and B_i.
Takahashi wrote integers into K of the vertices. Specifically, for each 1 ≦ j ≦ K, he wrote the integer P_j ... | instruction | 0 | 21,052 | 13 | 42,104 |
"Correct Solution:
```
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10**7)
INF = 10**10
n = int(input())
T = [[] for _ in range(n+1)]
for _ in range(n-1):
a, b = map(int, input().split())
T[a].append(b)
T[b].append(a)
k = int(input())
VP = tuple(tuple(map(int, input().split())) for _ in range(k))
... | output | 1 | 21,052 | 13 | 42,105 |
Provide a correct Python 3 solution for this coding contest problem.
We have a tree with N vertices. The vertices are numbered 1, 2, ..., N. The i-th (1 ≦ i ≦ N - 1) edge connects the two vertices A_i and B_i.
Takahashi wrote integers into K of the vertices. Specifically, for each 1 ≦ j ≦ K, he wrote the integer P_j ... | instruction | 0 | 21,053 | 13 | 42,106 |
"Correct Solution:
```
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10**5+100)
from collections import *
def dfs(v, pv, de):
for nv in G[v]:
if nv==pv:
continue
dfs(nv, v, de+1)
left[v] = max(left[v], left[nv]-1)
right[v] = min(right[v], right[nv]... | output | 1 | 21,053 | 13 | 42,107 |
Provide a correct Python 3 solution for this coding contest problem.
We have a tree with N vertices. The vertices are numbered 1, 2, ..., N. The i-th (1 ≦ i ≦ N - 1) edge connects the two vertices A_i and B_i.
Takahashi wrote integers into K of the vertices. Specifically, for each 1 ≦ j ≦ K, he wrote the integer P_j ... | instruction | 0 | 21,054 | 13 | 42,108 |
"Correct Solution:
```
import sys
input = sys.stdin.readline
sys.setrecursionlimit(10**5+100)
from collections import *
def dfs(v, pv, de):
for nv in G[v]:
if nv==pv:
continue
dfs(nv, v, de+1)
left[v] = max(left[v], left[nv]-1)
right[v] = min(right[v], right[nv]... | output | 1 | 21,054 | 13 | 42,109 |
Provide a correct Python 3 solution for this coding contest problem.
We have a tree with N vertices. The vertices are numbered 1, 2, ..., N. The i-th (1 ≦ i ≦ N - 1) edge connects the two vertices A_i and B_i.
Takahashi wrote integers into K of the vertices. Specifically, for each 1 ≦ j ≦ K, he wrote the integer P_j ... | instruction | 0 | 21,055 | 13 | 42,110 |
"Correct Solution:
```
import sys
sys.setrecursionlimit(10**6)
n = int(input())
tr = [list() for _ in range(n)]
num = [None]*n
ran = [0]*n
dep = [0]*n
for _ in range(n-1):
a,b = map(int,input().split())
a -= 1; b -= 1
tr[a].append(b)
tr[b].append(a)
k = int(input())
root,c = map(int,input().split())
root -= 1... | output | 1 | 21,055 | 13 | 42,111 |
Provide a correct Python 3 solution for this coding contest problem.
We have a tree with N vertices. The vertices are numbered 1, 2, ..., N. The i-th (1 ≦ i ≦ N - 1) edge connects the two vertices A_i and B_i.
Takahashi wrote integers into K of the vertices. Specifically, for each 1 ≦ j ≦ K, he wrote the integer P_j ... | instruction | 0 | 21,056 | 13 | 42,112 |
"Correct Solution:
```
from collections import deque
import sys
input = sys.stdin.readline
N = int(input())
adj = [[] for _ in range(N + 1)]
for _ in range(N-1):
A, B = map(int, input().split())
adj[A].append(B)
adj[B].append(A)
K = int(input())
ans = [[-10 ** 10 + 0.5, 10 ** 10 + 0.5] for _ in range(N + 1... | output | 1 | 21,056 | 13 | 42,113 |
Provide a correct Python 3 solution for this coding contest problem.
We have a tree with N vertices. The vertices are numbered 1, 2, ..., N. The i-th (1 ≦ i ≦ N - 1) edge connects the two vertices A_i and B_i.
Takahashi wrote integers into K of the vertices. Specifically, for each 1 ≦ j ≦ K, he wrote the integer P_j ... | instruction | 0 | 21,057 | 13 | 42,114 |
"Correct Solution:
```
from collections import deque
import sys
sys.setrecursionlimit(int(1e7))
def inpl(): return list(map(int, input().split()))
N = int(input())
G = [[] for _ in range(N+1)]
X = [-1 for _ in range(N+1)] # is odd
U = [1e7 for _ in range(N+1)]
L = [-1e7 for _ in range(N+1)]
for _ in range(N-1):
... | output | 1 | 21,057 | 13 | 42,115 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
We have a tree with N vertices. The vertices are numbered 1, 2, ..., N. The i-th (1 ≦ i ≦ N - 1) edge connects the two vertices A_i and B_i.
Takahashi wrote integers into K of the vertices. Spe... | instruction | 0 | 21,058 | 13 | 42,116 |
Yes | output | 1 | 21,058 | 13 | 42,117 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
We have a tree with N vertices. The vertices are numbered 1, 2, ..., N. The i-th (1 ≦ i ≦ N - 1) edge connects the two vertices A_i and B_i.
Takahashi wrote integers into K of the vertices. Spe... | instruction | 0 | 21,059 | 13 | 42,118 |
Yes | output | 1 | 21,059 | 13 | 42,119 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
We have a tree with N vertices. The vertices are numbered 1, 2, ..., N. The i-th (1 ≦ i ≦ N - 1) edge connects the two vertices A_i and B_i.
Takahashi wrote integers into K of the vertices. Spe... | instruction | 0 | 21,060 | 13 | 42,120 |
Yes | output | 1 | 21,060 | 13 | 42,121 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
We have a tree with N vertices. The vertices are numbered 1, 2, ..., N. The i-th (1 ≦ i ≦ N - 1) edge connects the two vertices A_i and B_i.
Takahashi wrote integers into K of the vertices. Spe... | instruction | 0 | 21,061 | 13 | 42,122 |
Yes | output | 1 | 21,061 | 13 | 42,123 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
We have a tree with N vertices. The vertices are numbered 1, 2, ..., N. The i-th (1 ≦ i ≦ N - 1) edge connects the two vertices A_i and B_i.
Takahashi wrote integers into K of the vertices. Spe... | instruction | 0 | 21,062 | 13 | 42,124 |
No | output | 1 | 21,062 | 13 | 42,125 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
We have a tree with N vertices. The vertices are numbered 1, 2, ..., N. The i-th (1 ≦ i ≦ N - 1) edge connects the two vertices A_i and B_i.
Takahashi wrote integers into K of the vertices. Spe... | instruction | 0 | 21,063 | 13 | 42,126 |
No | output | 1 | 21,063 | 13 | 42,127 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
We have a tree with N vertices. The vertices are numbered 1, 2, ..., N. The i-th (1 ≦ i ≦ N - 1) edge connects the two vertices A_i and B_i.
Takahashi wrote integers into K of the vertices. Spe... | instruction | 0 | 21,064 | 13 | 42,128 |
No | output | 1 | 21,064 | 13 | 42,129 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
We have a tree with N vertices. The vertices are numbered 1, 2, ..., N. The i-th (1 ≦ i ≦ N - 1) edge connects the two vertices A_i and B_i.
Takahashi wrote integers into K of the vertices. Spe... | instruction | 0 | 21,065 | 13 | 42,130 |
No | output | 1 | 21,065 | 13 | 42,131 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call an undirected graph of n vertices p-interesting, if the following conditions fulfill:
* the graph contains exactly 2n + p edges;
* the graph doesn't contain self-loops and multiple edges;
* for any integer k (1 ≤ k ≤ n),... | instruction | 0 | 21,536 | 13 | 43,072 |
Tags: brute force, constructive algorithms, graphs
Correct Solution:
```
for t in range(int(input())):
n, p = map(int, input().split())
i, j = 1, 2
for k in range(2 * n + p):
print(i, j)
j += 1
if j > n:
i += 1
j = i + 1
``` | output | 1 | 21,536 | 13 | 43,073 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call an undirected graph of n vertices p-interesting, if the following conditions fulfill:
* the graph contains exactly 2n + p edges;
* the graph doesn't contain self-loops and multiple edges;
* for any integer k (1 ≤ k ≤ n),... | instruction | 0 | 21,537 | 13 | 43,074 |
Tags: brute force, constructive algorithms, graphs
Correct Solution:
```
# Author : nitish420 --------------------------------------------------------------------
import os
import sys
from io import BytesIO, IOBase
def main():
for _ in range(int(input())):
n,p=map(int,input().split())
p+=(n<<1)
for i in range(... | output | 1 | 21,537 | 13 | 43,075 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call an undirected graph of n vertices p-interesting, if the following conditions fulfill:
* the graph contains exactly 2n + p edges;
* the graph doesn't contain self-loops and multiple edges;
* for any integer k (1 ≤ k ≤ n),... | instruction | 0 | 21,538 | 13 | 43,076 |
Tags: brute force, constructive algorithms, graphs
Correct Solution:
```
t = int(input())
for test in range(t):
n,p = map(int,input().split())
s = ""
for i in range(n):
s+=str(i+1)+' '+str((i+1)%n+1)+'\n'
s+=str(i+1)+' '+str((i+2)%n+1)+'\n'
if p > 0:
for i in range(n):
... | output | 1 | 21,538 | 13 | 43,077 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call an undirected graph of n vertices p-interesting, if the following conditions fulfill:
* the graph contains exactly 2n + p edges;
* the graph doesn't contain self-loops and multiple edges;
* for any integer k (1 ≤ k ≤ n),... | instruction | 0 | 21,539 | 13 | 43,078 |
Tags: brute force, constructive algorithms, graphs
Correct Solution:
```
t=int(input())
def readints():
return map(int, input().split(' '))
def solve():
n,p=readints()
# 2n-3
viz = [ [0]*n for _ in range(n) ]
for j in range(n):
viz[0][j]=viz[j][0]=1
for j in range(n):
viz[1][j]=viz[j][1]=1
# p+3... | output | 1 | 21,539 | 13 | 43,079 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call an undirected graph of n vertices p-interesting, if the following conditions fulfill:
* the graph contains exactly 2n + p edges;
* the graph doesn't contain self-loops and multiple edges;
* for any integer k (1 ≤ k ≤ n),... | instruction | 0 | 21,540 | 13 | 43,080 |
Tags: brute force, constructive algorithms, graphs
Correct Solution:
```
for i in range(int(input())):
n, p = map(int, input().split())
all = 2 * n + p
for j in range(1, n + 1):
for k in range(j + 1, n + 1):
if all <= 0:
break
print(j, k)
all -= 1
... | output | 1 | 21,540 | 13 | 43,081 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call an undirected graph of n vertices p-interesting, if the following conditions fulfill:
* the graph contains exactly 2n + p edges;
* the graph doesn't contain self-loops and multiple edges;
* for any integer k (1 ≤ k ≤ n),... | instruction | 0 | 21,541 | 13 | 43,082 |
Tags: brute force, constructive algorithms, graphs
Correct Solution:
```
#!/usr/bin/python3
import sys
input = lambda: sys.stdin.readline().strip()
def solve(n, p):
total = 0
for d in range(1, n):
for i in range(1, n + 1):
print(i, (i + d - 1) % n + 1)
total += 1
if ... | output | 1 | 21,541 | 13 | 43,083 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call an undirected graph of n vertices p-interesting, if the following conditions fulfill:
* the graph contains exactly 2n + p edges;
* the graph doesn't contain self-loops and multiple edges;
* for any integer k (1 ≤ k ≤ n),... | instruction | 0 | 21,542 | 13 | 43,084 |
Tags: brute force, constructive algorithms, graphs
Correct Solution:
```
for t in range(int(input())):
n, p = (int(x) for x in input().split())
g = [[0]*n for i in range(n)]
for i in range(n):
g[i][(i+1)%n] = g[(i+1)%n][i] = 1
g[i][(i+2)%n] = g[(i+2)%n][i] = 1
for i in range(n):
... | output | 1 | 21,542 | 13 | 43,085 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let's call an undirected graph of n vertices p-interesting, if the following conditions fulfill:
* the graph contains exactly 2n + p edges;
* the graph doesn't contain self-loops and multiple edges;
* for any integer k (1 ≤ k ≤ n),... | instruction | 0 | 21,543 | 13 | 43,086 |
Tags: brute force, constructive algorithms, graphs
Correct Solution:
```
# Legends Always Come Up with Solution
# Author: Manvir Singh
import os
from io import BytesIO, IOBase
import sys
def main():
for _ in range(int(input())):
n,p=map(int,input().split())
ans=[]
for i in range(0,n):
... | output | 1 | 21,543 | 13 | 43,087 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call an undirected graph of n vertices p-interesting, if the following conditions fulfill:
* the graph contains exactly 2n + p edges;
* the graph doesn't contain self-loops and mult... | instruction | 0 | 21,544 | 13 | 43,088 |
Yes | output | 1 | 21,544 | 13 | 43,089 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call an undirected graph of n vertices p-interesting, if the following conditions fulfill:
* the graph contains exactly 2n + p edges;
* the graph doesn't contain self-loops and mult... | instruction | 0 | 21,545 | 13 | 43,090 |
Yes | output | 1 | 21,545 | 13 | 43,091 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call an undirected graph of n vertices p-interesting, if the following conditions fulfill:
* the graph contains exactly 2n + p edges;
* the graph doesn't contain self-loops and mult... | instruction | 0 | 21,546 | 13 | 43,092 |
Yes | output | 1 | 21,546 | 13 | 43,093 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call an undirected graph of n vertices p-interesting, if the following conditions fulfill:
* the graph contains exactly 2n + p edges;
* the graph doesn't contain self-loops and mult... | instruction | 0 | 21,547 | 13 | 43,094 |
Yes | output | 1 | 21,547 | 13 | 43,095 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call an undirected graph of n vertices p-interesting, if the following conditions fulfill:
* the graph contains exactly 2n + p edges;
* the graph doesn't contain self-loops and mult... | instruction | 0 | 21,548 | 13 | 43,096 |
No | output | 1 | 21,548 | 13 | 43,097 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call an undirected graph of n vertices p-interesting, if the following conditions fulfill:
* the graph contains exactly 2n + p edges;
* the graph doesn't contain self-loops and mult... | instruction | 0 | 21,549 | 13 | 43,098 |
No | output | 1 | 21,549 | 13 | 43,099 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call an undirected graph of n vertices p-interesting, if the following conditions fulfill:
* the graph contains exactly 2n + p edges;
* the graph doesn't contain self-loops and mult... | instruction | 0 | 21,550 | 13 | 43,100 |
No | output | 1 | 21,550 | 13 | 43,101 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let's call an undirected graph of n vertices p-interesting, if the following conditions fulfill:
* the graph contains exactly 2n + p edges;
* the graph doesn't contain self-loops and mult... | instruction | 0 | 21,551 | 13 | 43,102 |
No | output | 1 | 21,551 | 13 | 43,103 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Whoa! You did a great job helping Team Rocket who managed to capture all the Pokemons sent by Bash. Meowth, part of Team Rocket, having already mastered the human language, now wants to become a... | instruction | 0 | 21,660 | 13 | 43,320 |
No | output | 1 | 21,660 | 13 | 43,321 |
Provide a correct Python 3 solution for this coding contest problem.
There is a tree with N vertices, numbered 1, 2, \ldots, N. For each i (1 \leq i \leq N - 1), the i-th edge connects Vertex x_i and y_i.
Taro has decided to paint each vertex in white or black. Here, it is not allowed to paint two adjacent vertices b... | instruction | 0 | 21,836 | 13 | 43,672 |
"Correct Solution:
```
N=int(input())
graph=[[] for i in range(N)]
for i in range(N-1):
a,b=list(map(int,input().strip().split(' ')))
a-=1
b-=1
graph[a]+=[b]
graph[b]+=[a]
parent=[-1]*N
checked=[0]*N
dp=[[0]*2 for i in range(N)]
from collections import deque
q=deque([0])
checked[0]=1
bfs=[]
while... | output | 1 | 21,836 | 13 | 43,673 |
Provide a correct Python 3 solution for this coding contest problem.
There is a tree with N vertices, numbered 1, 2, \ldots, N. For each i (1 \leq i \leq N - 1), the i-th edge connects Vertex x_i and y_i.
Taro has decided to paint each vertex in white or black. Here, it is not allowed to paint two adjacent vertices b... | instruction | 0 | 21,837 | 13 | 43,674 |
"Correct Solution:
```
import sys
input=sys.stdin.readline
sys.setrecursionlimit(10**7)
from collections import deque
mod=10**9+7
n=int(input())
edges=[[] for _ in range(n)]
for _ in range(n-1):
x,y=map(int,input().split())
edges[x-1].append(y-1)
edges[y-1].append(x-1)
root=-1
l=-1
for i in range(n):
if... | output | 1 | 21,837 | 13 | 43,675 |
Provide a correct Python 3 solution for this coding contest problem.
There is a tree with N vertices, numbered 1, 2, \ldots, N. For each i (1 \leq i \leq N - 1), the i-th edge connects Vertex x_i and y_i.
Taro has decided to paint each vertex in white or black. Here, it is not allowed to paint two adjacent vertices b... | instruction | 0 | 21,838 | 13 | 43,676 |
"Correct Solution:
```
modulo = 1000000007
import sys
sys.setrecursionlimit(100000009)
muchii = []
def recursie(x, y):
alb = 1
negru = 1
for elem in muchii[x]:
if elem == y:
continue
result_1, result_2 = recursie(elem, x)
alb = (alb * (result_1 + result_2)) % modulo
... | output | 1 | 21,838 | 13 | 43,677 |
Provide a correct Python 3 solution for this coding contest problem.
There is a tree with N vertices, numbered 1, 2, \ldots, N. For each i (1 \leq i \leq N - 1), the i-th edge connects Vertex x_i and y_i.
Taro has decided to paint each vertex in white or black. Here, it is not allowed to paint two adjacent vertices b... | instruction | 0 | 21,839 | 13 | 43,678 |
"Correct Solution:
```
import sys
sys.setrecursionlimit(10 ** 6)
def main():
N = int(input())
E = [[] for _ in range(N)]
for i in range(N - 1):
x, y = map(int, input().split())
E[x - 1].append(y - 1)
E[y - 1].append(x - 1)
v = [False] * N
def dp(n):
v[n] = True
... | output | 1 | 21,839 | 13 | 43,679 |
Provide a correct Python 3 solution for this coding contest problem.
There is a tree with N vertices, numbered 1, 2, \ldots, N. For each i (1 \leq i \leq N - 1), the i-th edge connects Vertex x_i and y_i.
Taro has decided to paint each vertex in white or black. Here, it is not allowed to paint two adjacent vertices b... | instruction | 0 | 21,840 | 13 | 43,680 |
"Correct Solution:
```
import sys
sys.setrecursionlimit(1000000000)
input = sys.stdin.readline
mod=10**9+7
n=int(input())
es=[[] for i in range(n)]
for i in range(n-1):
a,b=map(int,input().split())
es[a-1].append(b-1)
es[b-1].append(a-1)
dp=[[0,0] for i in range(n)]
def dfs(v,c,p):
if dp[v][c]:
ret... | output | 1 | 21,840 | 13 | 43,681 |
Provide a correct Python 3 solution for this coding contest problem.
There is a tree with N vertices, numbered 1, 2, \ldots, N. For each i (1 \leq i \leq N - 1), the i-th edge connects Vertex x_i and y_i.
Taro has decided to paint each vertex in white or black. Here, it is not allowed to paint two adjacent vertices b... | instruction | 0 | 21,841 | 13 | 43,682 |
"Correct Solution:
```
import sys
sys.setrecursionlimit(10**7)
n = int(input())
graph = {i:[] for i in range(n+1)}
for j in range(n-1):
x, y = [int(i) for i in sys.stdin.readline().split()]
x -= 1
y -= 1
graph[x].append(y)
graph[y].append(x)
memo_ls = [[None for j in range(2)] for i in range(n+1)]
... | output | 1 | 21,841 | 13 | 43,683 |
Provide a correct Python 3 solution for this coding contest problem.
There is a tree with N vertices, numbered 1, 2, \ldots, N. For each i (1 \leq i \leq N - 1), the i-th edge connects Vertex x_i and y_i.
Taro has decided to paint each vertex in white or black. Here, it is not allowed to paint two adjacent vertices b... | instruction | 0 | 21,842 | 13 | 43,684 |
"Correct Solution:
```
import sys
sys.setrecursionlimit(10**6)
mod=10**9+7
def dfs(v):
if checked[v]==1:
return
checked[v]=1
dp[v][0]=1
dp[v][1]=1
for u in g[v]:
if checked[u]==0:
dfs(u)
dp[v][0]=(dp[v][0]*(dp[u][0]+dp[u][1]))%mod
dp[v][1]=(dp[v][1]*dp[u][0])%mod
n=int(input())
g=[... | output | 1 | 21,842 | 13 | 43,685 |
Provide a correct Python 3 solution for this coding contest problem.
There is a tree with N vertices, numbered 1, 2, \ldots, N. For each i (1 \leq i \leq N - 1), the i-th edge connects Vertex x_i and y_i.
Taro has decided to paint each vertex in white or black. Here, it is not allowed to paint two adjacent vertices b... | instruction | 0 | 21,843 | 13 | 43,686 |
"Correct Solution:
```
import sys
def input(): return sys.stdin.readline().rstrip()
from collections import deque
def main():
n=int(input())
XY=[tuple(map(int,input().split())) for i in range(n-1)]
graph=[[]for _ in range(n)]
for x,y in XY:
graph[x-1].append(y-1)
graph[y-1].append(x-1)
... | output | 1 | 21,843 | 13 | 43,687 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a tree with N vertices, numbered 1, 2, \ldots, N. For each i (1 \leq i \leq N - 1), the i-th edge connects Vertex x_i and y_i.
Taro has decided to paint each vertex in white or black. ... | instruction | 0 | 21,844 | 13 | 43,688 |
Yes | output | 1 | 21,844 | 13 | 43,689 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a tree with N vertices, numbered 1, 2, \ldots, N. For each i (1 \leq i \leq N - 1), the i-th edge connects Vertex x_i and y_i.
Taro has decided to paint each vertex in white or black. ... | instruction | 0 | 21,845 | 13 | 43,690 |
Yes | output | 1 | 21,845 | 13 | 43,691 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a tree with N vertices, numbered 1, 2, \ldots, N. For each i (1 \leq i \leq N - 1), the i-th edge connects Vertex x_i and y_i.
Taro has decided to paint each vertex in white or black. ... | instruction | 0 | 21,846 | 13 | 43,692 |
Yes | output | 1 | 21,846 | 13 | 43,693 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a tree with N vertices, numbered 1, 2, \ldots, N. For each i (1 \leq i \leq N - 1), the i-th edge connects Vertex x_i and y_i.
Taro has decided to paint each vertex in white or black. ... | instruction | 0 | 21,847 | 13 | 43,694 |
Yes | output | 1 | 21,847 | 13 | 43,695 |
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