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 tags and a correct Python 3 solution for this coding contest problem.
...Once upon a time a man came to the sea. The sea was stormy and dark. The man started to call for the little mermaid to appear but alas, he only woke up Cthulhu...
Whereas on the other end of the world Pentagon is actively collecting info... | instruction | 0 | 68,166 | 13 | 136,332 |
Tags: dfs and similar, dsu, graphs
Correct Solution:
```
from collections import defaultdict
d=defaultdict(list)
n,m=map(int,input().split())
for i in range(m):
a,b=map(int,input().split())
a-=1
b-=1
d[a].append(b)
d[b].append(a)
vis=[0]*n
q=[0]
vis[0]=1
while q:
t=q.pop(0)
for i in d[... | output | 1 | 68,166 | 13 | 136,333 |
Provide tags and a correct Python 3 solution for this coding contest problem.
...Once upon a time a man came to the sea. The sea was stormy and dark. The man started to call for the little mermaid to appear but alas, he only woke up Cthulhu...
Whereas on the other end of the world Pentagon is actively collecting info... | instruction | 0 | 68,167 | 13 | 136,334 |
Tags: dfs and similar, dsu, graphs
Correct Solution:
```
parent = dict()
ranks = dict()
def make_set(N):
global parent, ranks
parent = [i for i in range(N + 5)]
ranks = [0 for i in range(N + 5)]
def find_set(u):
while u != parent[u]:
u = parent[u]
return u
# if parent[u] != u:
# ... | output | 1 | 68,167 | 13 | 136,335 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
...Once upon a time a man came to the sea. The sea was stormy and dark. The man started to call for the little mermaid to appear but alas, he only woke up Cthulhu...
Whereas on the other end of... | instruction | 0 | 68,168 | 13 | 136,336 |
Yes | output | 1 | 68,168 | 13 | 136,337 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
...Once upon a time a man came to the sea. The sea was stormy and dark. The man started to call for the little mermaid to appear but alas, he only woke up Cthulhu...
Whereas on the other end of... | instruction | 0 | 68,169 | 13 | 136,338 |
Yes | output | 1 | 68,169 | 13 | 136,339 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
...Once upon a time a man came to the sea. The sea was stormy and dark. The man started to call for the little mermaid to appear but alas, he only woke up Cthulhu...
Whereas on the other end of... | instruction | 0 | 68,170 | 13 | 136,340 |
Yes | output | 1 | 68,170 | 13 | 136,341 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
...Once upon a time a man came to the sea. The sea was stormy and dark. The man started to call for the little mermaid to appear but alas, he only woke up Cthulhu...
Whereas on the other end of... | instruction | 0 | 68,171 | 13 | 136,342 |
Yes | output | 1 | 68,171 | 13 | 136,343 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
...Once upon a time a man came to the sea. The sea was stormy and dark. The man started to call for the little mermaid to appear but alas, he only woke up Cthulhu...
Whereas on the other end of... | instruction | 0 | 68,172 | 13 | 136,344 |
No | output | 1 | 68,172 | 13 | 136,345 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
...Once upon a time a man came to the sea. The sea was stormy and dark. The man started to call for the little mermaid to appear but alas, he only woke up Cthulhu...
Whereas on the other end of... | instruction | 0 | 68,173 | 13 | 136,346 |
No | output | 1 | 68,173 | 13 | 136,347 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
...Once upon a time a man came to the sea. The sea was stormy and dark. The man started to call for the little mermaid to appear but alas, he only woke up Cthulhu...
Whereas on the other end of... | instruction | 0 | 68,174 | 13 | 136,348 |
No | output | 1 | 68,174 | 13 | 136,349 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
...Once upon a time a man came to the sea. The sea was stormy and dark. The man started to call for the little mermaid to appear but alas, he only woke up Cthulhu...
Whereas on the other end of... | instruction | 0 | 68,175 | 13 | 136,350 |
No | output | 1 | 68,175 | 13 | 136,351 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Ujan has a lot of useless stuff in his drawers, a considerable part of which are his math notebooks: it is time to sort them out. This time he found an old dusty graph theory notebook with a description of a graph.
It is an undirected weigh... | instruction | 0 | 68,242 | 13 | 136,484 |
Tags: dfs and similar, dsu, graphs, sortings
Correct Solution:
```
import collections as cc
import sys
input=sys.stdin.readline
#sys.setrecursionlimit(10**9)
I=lambda:list(map(int,input().split()))
n,m=I()
g=[set() for i in range(n+1)]
xx=[0]*(n+1)
for i in range(m):
x,y=I()
g[x].add(y)
g[y].add(x)
parent=[i for i i... | output | 1 | 68,242 | 13 | 136,485 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Ujan has a lot of useless stuff in his drawers, a considerable part of which are his math notebooks: it is time to sort them out. This time he found an old dusty graph theory notebook with a description of a graph.
It is an undirected weigh... | instruction | 0 | 68,243 | 13 | 136,486 |
Tags: dfs and similar, dsu, graphs, sortings
Correct Solution:
```
# from sys import stdin
# def rl():
# return [int(w) for w in stdin.readline().split()]
from bisect import bisect_right
from bisect import bisect_left
from collections import defaultdict
from math import sqrt,factorial,gcd,log2,inf,ceil
# map(int,in... | output | 1 | 68,243 | 13 | 136,487 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Ujan has a lot of useless stuff in his drawers, a considerable part of which are his math notebooks: it is time to sort them out. This time he found an old dusty graph theory notebook with a description of a graph.
It is an undirected weigh... | instruction | 0 | 68,244 | 13 | 136,488 |
Tags: dfs and similar, dsu, graphs, sortings
Correct Solution:
```
import sys
input = sys.stdin.readline
I = lambda : list(map(int,input().split()))
sys.setrecursionlimit(10**5)
n,m=I()
g=[set() for i in range(n)]
for i in range(m):
u,v=I()
g[u-1].add(v-1)
g[v-1].add(u-1)
p=[i for i in range(n)]
def find(x):
while... | output | 1 | 68,244 | 13 | 136,489 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Ujan has a lot of useless stuff in his drawers, a considerable part of which are his math notebooks: it is time to sort them out. This time he found an old dusty graph theory notebook with a description of a graph.
It is an undirected weigh... | instruction | 0 | 68,245 | 13 | 136,490 |
Tags: dfs and similar, dsu, graphs, sortings
Correct Solution:
```
n, m = map(int, input().split())
inp = set()
for _ in range(m):
a, b = map(int, input().split())
inp.add((a - 1, b - 1))
inp.add((b - 1, a - 1))
unc = set(range(n))
ans = -1
for i in range(n):
if i in unc:
ans += 1
unc.re... | output | 1 | 68,245 | 13 | 136,491 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Ujan has a lot of useless stuff in his drawers, a considerable part of which are his math notebooks: it is time to sort them out. This time he found an old dusty graph theory notebook with a description of a graph.
It is an undirected weigh... | instruction | 0 | 68,246 | 13 | 136,492 |
Tags: dfs and similar, dsu, graphs, sortings
Correct Solution:
```
import sys
import queue
class UF(object):
def __init__(self, n):
self.arr = list(range(n+1))
self.rank = [1]*(n+1)
def root(self, x):
if self.arr[x] != x:
self.arr[x] = self.root(self.arr[x])
ret... | output | 1 | 68,246 | 13 | 136,493 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Ujan has a lot of useless stuff in his drawers, a considerable part of which are his math notebooks: it is time to sort them out. This time he found an old dusty graph theory notebook with a description of a graph.
It is an undirected weigh... | instruction | 0 | 68,247 | 13 | 136,494 |
Tags: dfs and similar, dsu, graphs, sortings
Correct Solution:
```
from collections import deque
from sys import stdin
global q,node,check
node,node2=[[]for i in range(100001)],[[]for i in range(100001)]
n,m=map(int,input().split())
small,big=[],[]
q=deque()
check=[0]*100001
def bfs():
while(len(q)>0):
p=q[... | output | 1 | 68,247 | 13 | 136,495 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Ujan has a lot of useless stuff in his drawers, a considerable part of which are his math notebooks: it is time to sort them out. This time he found an old dusty graph theory notebook with a description of a graph.
It is an undirected weigh... | instruction | 0 | 68,248 | 13 | 136,496 |
Tags: dfs and similar, dsu, graphs, sortings
Correct Solution:
```
# by the authority of GOD author: manhar singh sachdev #
import os,sys
from io import BytesIO,IOBase
def main():
n,m = map(int,input().split())
path = [set() for _ in range(n)]
for _ in range(m):
a1,b1 = map(lambda xx:int(xx)-1... | output | 1 | 68,248 | 13 | 136,497 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Ujan has a lot of useless stuff in his drawers, a considerable part of which are his math notebooks: it is time to sort them out. This time he found an old dusty graph theory notebook with a description of a graph.
It is an undirected weigh... | instruction | 0 | 68,249 | 13 | 136,498 |
Tags: dfs and similar, dsu, graphs, sortings
Correct Solution:
```
from sys import stdin
def rl():
return [int(w) for w in stdin.readline().split()]
n,m = rl()
he = [set() for _ in range(n+1)]
for _ in range(m):
a,b = rl()
he[a].add(b)
he[b].add(a)
unvisited = set(range(1,n+1))
ccs = 0
while unvisited... | output | 1 | 68,249 | 13 | 136,499 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Ujan has a lot of useless stuff in his drawers, a considerable part of which are his math notebooks: it is time to sort them out. This time he found an old dusty graph theory notebook with a des... | instruction | 0 | 68,250 | 13 | 136,500 |
Yes | output | 1 | 68,250 | 13 | 136,501 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Ujan has a lot of useless stuff in his drawers, a considerable part of which are his math notebooks: it is time to sort them out. This time he found an old dusty graph theory notebook with a des... | instruction | 0 | 68,251 | 13 | 136,502 |
Yes | output | 1 | 68,251 | 13 | 136,503 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Ujan has a lot of useless stuff in his drawers, a considerable part of which are his math notebooks: it is time to sort them out. This time he found an old dusty graph theory notebook with a des... | instruction | 0 | 68,252 | 13 | 136,504 |
Yes | output | 1 | 68,252 | 13 | 136,505 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Ujan has a lot of useless stuff in his drawers, a considerable part of which are his math notebooks: it is time to sort them out. This time he found an old dusty graph theory notebook with a des... | instruction | 0 | 68,253 | 13 | 136,506 |
Yes | output | 1 | 68,253 | 13 | 136,507 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Ujan has a lot of useless stuff in his drawers, a considerable part of which are his math notebooks: it is time to sort them out. This time he found an old dusty graph theory notebook with a des... | instruction | 0 | 68,254 | 13 | 136,508 |
No | output | 1 | 68,254 | 13 | 136,509 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Ujan has a lot of useless stuff in his drawers, a considerable part of which are his math notebooks: it is time to sort them out. This time he found an old dusty graph theory notebook with a des... | instruction | 0 | 68,255 | 13 | 136,510 |
No | output | 1 | 68,255 | 13 | 136,511 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Ujan has a lot of useless stuff in his drawers, a considerable part of which are his math notebooks: it is time to sort them out. This time he found an old dusty graph theory notebook with a des... | instruction | 0 | 68,256 | 13 | 136,512 |
No | output | 1 | 68,256 | 13 | 136,513 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Ujan has a lot of useless stuff in his drawers, a considerable part of which are his math notebooks: it is time to sort them out. This time he found an old dusty graph theory notebook with a des... | instruction | 0 | 68,257 | 13 | 136,514 |
No | output | 1 | 68,257 | 13 | 136,515 |
Evaluate the correctness of the submitted Python 2 solution to the coding contest problem. Provide a "Yes" or "No" response.
Ujan has a lot of useless stuff in his drawers, a considerable part of which are his math notebooks: it is time to sort them out. This time he found an old dusty graph theory notebook with a des... | instruction | 0 | 68,258 | 13 | 136,516 |
No | output | 1 | 68,258 | 13 | 136,517 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Parsa has a humongous tree on n vertices.
On each vertex v he has written two integers l_v and r_v.
To make Parsa's tree look even more majestic, Nima wants to assign a number a_v (l_v ≤ a_v ≤ r_v) to each vertex v such that the beauty of ... | instruction | 0 | 68,390 | 13 | 136,780 |
Tags: dfs and similar, divide and conquer, dp, greedy, trees
Correct Solution:
```
import io,os
input = io.BytesIO(os.read(0, os.fstat(0).st_size)).readline
def main():
T = int(input())
t = 1
while t<=T:
n = int(input())
neigh = [[] for i in range(n)]
smallest = [0]*n
... | output | 1 | 68,390 | 13 | 136,781 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Parsa has a humongous tree on n vertices.
On each vertex v he has written two integers l_v and r_v.
To make Parsa's tree look even more majestic, Nima wants to assign a number a_v (l_v ≤ a_v ≤ r_v) to each vertex v such that the beauty of ... | instruction | 0 | 68,391 | 13 | 136,782 |
Tags: dfs and similar, divide and conquer, dp, greedy, trees
Correct Solution:
```
import sys
input=sys.stdin.buffer.readline
for t in range(int(input())):
N=int(input())
X=[list(map(int,input().split())) for i in range(N)]
G=[[] for i in range(N)]
for i in range(N-1):
a,b=map(int,input().split())
a-=1... | output | 1 | 68,391 | 13 | 136,783 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Parsa has a humongous tree on n vertices.
On each vertex v he has written two integers l_v and r_v.
To make Parsa's tree look even more majestic, Nima wants to assign a number a_v (l_v ≤ a_v ≤ r_v) to each vertex v such that the beauty of ... | instruction | 0 | 68,392 | 13 | 136,784 |
Tags: dfs and similar, divide and conquer, dp, greedy, trees
Correct Solution:
```
import sys
input = sys.stdin.buffer.readline
for _ in range(int(input())):
n = int(input())
a = [0] + [list(map(int,input().split())) for i in range(n)]
adj = [[] for i in range(n+1)]
for i in range(n-1):
u,v ... | output | 1 | 68,392 | 13 | 136,785 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Parsa has a humongous tree on n vertices.
On each vertex v he has written two integers l_v and r_v.
To make Parsa's tree look even more majestic, Nima wants to assign a number a_v (l_v ≤ a_v ≤ r_v) to each vertex v such that the beauty of ... | instruction | 0 | 68,393 | 13 | 136,786 |
Tags: dfs and similar, divide and conquer, dp, greedy, trees
Correct Solution:
```
import sys
input = sys.stdin.buffer.readline
def main():
t = int(input()); INF = float("inf")
for _ in range(t):
n = int(input())
L = []; R = []
for i in range(n):
l,r = map(int,input().split(... | output | 1 | 68,393 | 13 | 136,787 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Parsa has a humongous tree on n vertices.
On each vertex v he has written two integers l_v and r_v.
To make Parsa's tree look even more majestic, Nima wants to assign a number a_v (l_v ≤ a_v ≤ r_v) to each vertex v such that the beauty of ... | instruction | 0 | 68,394 | 13 | 136,788 |
Tags: dfs and similar, divide and conquer, dp, greedy, trees
Correct Solution:
```
import io
import os
from bisect import bisect_left, bisect_right
from collections import Counter, defaultdict, deque
from heapq import heappush, heappop, heapify
from math import gcd, inf
from types import GeneratorType
# From https:/... | output | 1 | 68,394 | 13 | 136,789 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Parsa has a humongous tree on n vertices.
On each vertex v he has written two integers l_v and r_v.
To make Parsa's tree look even more majestic, Nima wants to assign a number a_v (l_v ≤ a_v ≤ r_v) to each vertex v such that the beauty of ... | instruction | 0 | 68,395 | 13 | 136,790 |
Tags: dfs and similar, divide and conquer, dp, greedy, trees
Correct Solution:
```
#start_time = time.time()
#def TIME_(): print(time.time()-start_time)
import os, sys
from io import BytesIO, IOBase
from types import GeneratorType
BUFSIZE = 8192
class FastIO(IOBase):
newlines = 0
def __init__(self, file):
... | output | 1 | 68,395 | 13 | 136,791 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Parsa has a humongous tree on n vertices.
On each vertex v he has written two integers l_v and r_v.
To make Parsa's tree look even more majestic, Nima wants to assign a number a_v (l_v ≤ a_v ≤ r_v) to each vertex v such that the beauty of ... | instruction | 0 | 68,396 | 13 | 136,792 |
Tags: dfs and similar, divide and conquer, dp, greedy, trees
Correct Solution:
```
# by the authority of GOD author: manhar singh sachdev #
import os,sys
from io import BytesIO,IOBase
def main():
for _ in range(int(input())):
n = int(input())
l = [tuple(map(int,input().split())) for _ in range(n... | output | 1 | 68,396 | 13 | 136,793 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Parsa has a humongous tree on n vertices.
On each vertex v he has written two integers l_v and r_v.
To make Parsa's tree look even more majestic, Nima wants to assign a number a_v (l_v ≤ a_v ≤ r_v) to each vertex v such that the beauty of ... | instruction | 0 | 68,397 | 13 | 136,794 |
Tags: dfs and similar, divide and conquer, dp, greedy, trees
Correct Solution:
```
import sys
input = sys.stdin.buffer.readline
for _ in range(int(input())):
n = int(input())
adj = [[] for i in range(0,n+1)]
points = [0]
dp = [[0.0 for i in range(2)]for i in range(n+1)]
points = [0] + [li... | output | 1 | 68,397 | 13 | 136,795 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Parsa has a humongous tree on n vertices.
On each vertex v he has written two integers l_v and r_v.
To make Parsa's tree look even more majestic, Nima wants to assign a number a_v (l_v ≤ a_v ≤... | instruction | 0 | 68,398 | 13 | 136,796 |
Yes | output | 1 | 68,398 | 13 | 136,797 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Parsa has a humongous tree on n vertices.
On each vertex v he has written two integers l_v and r_v.
To make Parsa's tree look even more majestic, Nima wants to assign a number a_v (l_v ≤ a_v ≤... | instruction | 0 | 68,399 | 13 | 136,798 |
Yes | output | 1 | 68,399 | 13 | 136,799 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Parsa has a humongous tree on n vertices.
On each vertex v he has written two integers l_v and r_v.
To make Parsa's tree look even more majestic, Nima wants to assign a number a_v (l_v ≤ a_v ≤... | instruction | 0 | 68,400 | 13 | 136,800 |
Yes | output | 1 | 68,400 | 13 | 136,801 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Parsa has a humongous tree on n vertices.
On each vertex v he has written two integers l_v and r_v.
To make Parsa's tree look even more majestic, Nima wants to assign a number a_v (l_v ≤ a_v ≤... | instruction | 0 | 68,401 | 13 | 136,802 |
Yes | output | 1 | 68,401 | 13 | 136,803 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Parsa has a humongous tree on n vertices.
On each vertex v he has written two integers l_v and r_v.
To make Parsa's tree look even more majestic, Nima wants to assign a number a_v (l_v ≤ a_v ≤... | instruction | 0 | 68,402 | 13 | 136,804 |
No | output | 1 | 68,402 | 13 | 136,805 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Parsa has a humongous tree on n vertices.
On each vertex v he has written two integers l_v and r_v.
To make Parsa's tree look even more majestic, Nima wants to assign a number a_v (l_v ≤ a_v ≤... | instruction | 0 | 68,403 | 13 | 136,806 |
No | output | 1 | 68,403 | 13 | 136,807 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Parsa has a humongous tree on n vertices.
On each vertex v he has written two integers l_v and r_v.
To make Parsa's tree look even more majestic, Nima wants to assign a number a_v (l_v ≤ a_v ≤... | instruction | 0 | 68,404 | 13 | 136,808 |
No | output | 1 | 68,404 | 13 | 136,809 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Parsa has a humongous tree on n vertices.
On each vertex v he has written two integers l_v and r_v.
To make Parsa's tree look even more majestic, Nima wants to assign a number a_v (l_v ≤ a_v ≤... | instruction | 0 | 68,405 | 13 | 136,810 |
No | output | 1 | 68,405 | 13 | 136,811 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Programming teacher Dmitry Olegovich is going to propose the following task for one of his tests for students:
You are given a tree T with n vertices, specified by its adjacency matrix a[1... n... | instruction | 0 | 68,527 | 13 | 137,054 |
No | output | 1 | 68,527 | 13 | 137,055 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Programming teacher Dmitry Olegovich is going to propose the following task for one of his tests for students:
You are given a tree T with n vertices, specified by its adjacency matrix a[1... n... | instruction | 0 | 68,528 | 13 | 137,056 |
No | output | 1 | 68,528 | 13 | 137,057 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Programming teacher Dmitry Olegovich is going to propose the following task for one of his tests for students:
You are given a tree T with n vertices, specified by its adjacency matrix a[1... n... | instruction | 0 | 68,529 | 13 | 137,058 |
No | output | 1 | 68,529 | 13 | 137,059 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Programming teacher Dmitry Olegovich is going to propose the following task for one of his tests for students:
You are given a tree T with n vertices, specified by its adjacency matrix a[1... n... | instruction | 0 | 68,530 | 13 | 137,060 |
No | output | 1 | 68,530 | 13 | 137,061 |
Provide a correct Python 3 solution for this coding contest problem.
Given is a tree T with N vertices. The i-th edge connects Vertex A_i and B_i (1 \leq A_i,B_i \leq N).
Now, each vertex is painted black with probability 1/2 and white with probability 1/2, which is chosen independently from other vertices. Then, let... | instruction | 0 | 68,713 | 13 | 137,426 |
"Correct Solution:
```
import sys
sys.setrecursionlimit(1000000)
mod = 10 ** 9 + 7
N, *AB = map(int, open(0).read().split())
E = [[] for _ in range(N + 1)]
for i, (a, b) in enumerate(zip(*[iter(AB)] * 2)):
E[a - 1].append((b - 1, i))
E[b - 1].append((a - 1, i))
X = [0] * N
def dfs(u, p):
res = 1
fo... | output | 1 | 68,713 | 13 | 137,427 |
Provide a correct Python 3 solution for this coding contest problem.
Given is a tree T with N vertices. The i-th edge connects Vertex A_i and B_i (1 \leq A_i,B_i \leq N).
Now, each vertex is painted black with probability 1/2 and white with probability 1/2, which is chosen independently from other vertices. Then, let... | instruction | 0 | 68,714 | 13 | 137,428 |
"Correct Solution:
```
n = int(input())
mod = 10**9 + 7
# 前準備
import sys
input = sys.stdin.readline
from collections import deque
graph = [[] for _ in range(n+1)]
for _ in range(n-1):
a,b = map(int,input().split())
graph[a].append(b)
graph[b].append(a)
ini = 0
# calcの定義 : 2辺を合わせる演算
def calc(a,b):
re... | output | 1 | 68,714 | 13 | 137,429 |
Provide a correct Python 3 solution for this coding contest problem.
Given is a tree T with N vertices. The i-th edge connects Vertex A_i and B_i (1 \leq A_i,B_i \leq N).
Now, each vertex is painted black with probability 1/2 and white with probability 1/2, which is chosen independently from other vertices. Then, let... | instruction | 0 | 68,715 | 13 | 137,430 |
"Correct Solution:
```
import sys
input = sys.stdin.readline
from collections import deque
def r(a):
for i in range(1, 10001):
if i and a * i % mod <= 10000:
return str(a*i%mod) + "/" + str(i)
if i and -a * i % mod <= 10000:
return str(-(-a*i%mod)) + "/" + str(i)
return a... | output | 1 | 68,715 | 13 | 137,431 |
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