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 |
|---|---|---|---|---|---|
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 | 21,848 | 13 | 43,696 |
No | output | 1 | 21,848 | 13 | 43,697 |
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 | 21,849 | 13 | 43,698 |
No | output | 1 | 21,849 | 13 | 43,699 |
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 | 21,850 | 13 | 43,700 |
No | output | 1 | 21,850 | 13 | 43,701 |
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 | 21,851 | 13 | 43,702 |
No | output | 1 | 21,851 | 13 | 43,703 |
Provide a correct Python 3 solution for this coding contest problem.
Gilbert is the network admin of Ginkgo company. His boss is mad about the messy network cables on the floor. He finally walked up to Gilbert and asked the lazy network admin to illustrate how computers and switches are connected. Since he is a progra... | instruction | 0 | 21,961 | 13 | 43,922 |
"Correct Solution:
```
def solve():
from sys import stdin
f_i = stdin
# function to update distance between switch and computer
def dfs(sw_id, prev, dist):
switch[sw_id].append(dist)
for next_sw in adj[sw_id]:
if next_sw != prev:
dfs(next_sw, sw_id, dist ... | output | 1 | 21,961 | 13 | 43,923 |
Provide a correct Python 3 solution for this coding contest problem.
Binary trees are defined recursively. A binary tree T is a structure defined on a finite set of nodes that either
* contains no nodes, or
* is composed of three disjoint sets of nodes:
- a root node.
- a binary tree called its left subtree.
- a bina... | instruction | 0 | 21,975 | 13 | 43,950 |
"Correct Solution:
```
N = int(input())
T = [list(map(int,input().split())) for _ in range(N)]
T.sort(key = lambda x:x[0])
class Node:
def __init__(self,data,l_child,r_child):
self.data = data
self.l_child = l_child
self.r_child = r_child
T = [Node(T[i][0],T[i][1],T[i][2]) for i in range(... | output | 1 | 21,975 | 13 | 43,951 |
Provide a correct Python 3 solution for this coding contest problem.
Binary trees are defined recursively. A binary tree T is a structure defined on a finite set of nodes that either
* contains no nodes, or
* is composed of three disjoint sets of nodes:
- a root node.
- a binary tree called its left subtree.
- a bina... | instruction | 0 | 21,976 | 13 | 43,952 |
"Correct Solution:
```
graph = [[1,2],[0],[0,3,4],[2,4,5],[2,3,6],[3],[4]]
sakigake = []
nakagake = []
atogake = []
def main():
n = int(input())
tree = [[] for i in range(n)]
check = [False]*n
for i in range(n):
a,b,c = list(map(int,input().split()))
if b != -1:tree[a].append(b)
... | output | 1 | 21,976 | 13 | 43,953 |
Provide a correct Python 3 solution for this coding contest problem.
Binary trees are defined recursively. A binary tree T is a structure defined on a finite set of nodes that either
* contains no nodes, or
* is composed of three disjoint sets of nodes:
- a root node.
- a binary tree called its left subtree.
- a bina... | instruction | 0 | 21,977 | 13 | 43,954 |
"Correct Solution:
```
dic, link = (dict() for i in range(2))
n = int(input())
se = set(int(x) for x in range(n))
for i in range(n):
a, b, c = map(int, input().split())
link[a] = list()
for bc in [b, c]:
link[a].append(bc)
se.discard(bc)
rt = se.pop()
pre_odr, in_odr, pst_odr = ([] for i i... | output | 1 | 21,977 | 13 | 43,955 |
Provide a correct Python 3 solution for this coding contest problem.
Binary trees are defined recursively. A binary tree T is a structure defined on a finite set of nodes that either
* contains no nodes, or
* is composed of three disjoint sets of nodes:
- a root node.
- a binary tree called its left subtree.
- a bina... | instruction | 0 | 21,978 | 13 | 43,956 |
"Correct Solution:
```
if __name__ == '__main__':
import sys
input = sys.stdin.readline
from collections import defaultdict
NIL = -1
n = int(input())
# pythonは構造体を用意するのに手間取るので、辞書型を使う
T = defaultdict(lambda: {'l':NIL, 'r':NIL, 'p':NIL})
for _ in range(n):
u, l, r = map(int, i... | output | 1 | 21,978 | 13 | 43,957 |
Provide a correct Python 3 solution for this coding contest problem.
Binary trees are defined recursively. A binary tree T is a structure defined on a finite set of nodes that either
* contains no nodes, or
* is composed of three disjoint sets of nodes:
- a root node.
- a binary tree called its left subtree.
- a bina... | instruction | 0 | 21,979 | 13 | 43,958 |
"Correct Solution:
```
INDEX_LEFT = 0
INDEX_RIGHT = 1
# INPUT
n = int(input())
list_child = [[] for _ in range(n)]
list_parent = [-1 for _ in range(n)]
for _ in range(n):
id, *C = map(int, input().split())
list_child[int(id)].extend(C)
for c in C:
if c == -1:
continue
lis... | output | 1 | 21,979 | 13 | 43,959 |
Provide a correct Python 3 solution for this coding contest problem.
Binary trees are defined recursively. A binary tree T is a structure defined on a finite set of nodes that either
* contains no nodes, or
* is composed of three disjoint sets of nodes:
- a root node.
- a binary tree called its left subtree.
- a bina... | instruction | 0 | 21,980 | 13 | 43,960 |
"Correct Solution:
```
n = int(input())
tree = [None] * n
root = set(range(n))
def preorder(i):
if i == -1: return
(l, r) = tree[i]
yield i
for v in preorder(l): yield v
for v in preorder(r): yield v
def inorder(i):
if i == -1: return
(l, r) = tree[i]
for v in inorder(l): yield v
... | output | 1 | 21,980 | 13 | 43,961 |
Provide a correct Python 3 solution for this coding contest problem.
Binary trees are defined recursively. A binary tree T is a structure defined on a finite set of nodes that either
* contains no nodes, or
* is composed of three disjoint sets of nodes:
- a root node.
- a binary tree called its left subtree.
- a bina... | instruction | 0 | 21,981 | 13 | 43,962 |
"Correct Solution:
```
from collections import defaultdict
def preorder(here, conn, chain):
if here == -1:
return
chain.append(here)
if conn[here]:
preorder(conn[here][0], conn, chain)
preorder(conn[here][1], conn, chain)
def inorder(here, conn, chain):
if here == -1:
re... | output | 1 | 21,981 | 13 | 43,963 |
Provide a correct Python 3 solution for this coding contest problem.
Binary trees are defined recursively. A binary tree T is a structure defined on a finite set of nodes that either
* contains no nodes, or
* is composed of three disjoint sets of nodes:
- a root node.
- a binary tree called its left subtree.
- a bina... | instruction | 0 | 21,982 | 13 | 43,964 |
"Correct Solution:
```
n = int(input())
left = [None for i in range(n)]
right = [None for i in range(n)]
root = sum(range(n)) - n - 1
for i in range(n):
i, l, r = map(int, input().split())
left[i] = l
right[i] = r
root -= (l + r)
def Preorder(i):
if (i == -1):
return
print(" {}".format... | output | 1 | 21,982 | 13 | 43,965 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Binary trees are defined recursively. A binary tree T is a structure defined on a finite set of nodes that either
* contains no nodes, or
* is composed of three disjoint sets of nodes:
- a root... | instruction | 0 | 21,983 | 13 | 43,966 |
Yes | output | 1 | 21,983 | 13 | 43,967 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Binary trees are defined recursively. A binary tree T is a structure defined on a finite set of nodes that either
* contains no nodes, or
* is composed of three disjoint sets of nodes:
- a root... | instruction | 0 | 21,984 | 13 | 43,968 |
Yes | output | 1 | 21,984 | 13 | 43,969 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Binary trees are defined recursively. A binary tree T is a structure defined on a finite set of nodes that either
* contains no nodes, or
* is composed of three disjoint sets of nodes:
- a root... | instruction | 0 | 21,985 | 13 | 43,970 |
Yes | output | 1 | 21,985 | 13 | 43,971 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Binary trees are defined recursively. A binary tree T is a structure defined on a finite set of nodes that either
* contains no nodes, or
* is composed of three disjoint sets of nodes:
- a root... | instruction | 0 | 21,986 | 13 | 43,972 |
Yes | output | 1 | 21,986 | 13 | 43,973 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Binary trees are defined recursively. A binary tree T is a structure defined on a finite set of nodes that either
* contains no nodes, or
* is composed of three disjoint sets of nodes:
- a root... | instruction | 0 | 21,987 | 13 | 43,974 |
No | output | 1 | 21,987 | 13 | 43,975 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Binary trees are defined recursively. A binary tree T is a structure defined on a finite set of nodes that either
* contains no nodes, or
* is composed of three disjoint sets of nodes:
- a root... | instruction | 0 | 21,988 | 13 | 43,976 |
No | output | 1 | 21,988 | 13 | 43,977 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Binary trees are defined recursively. A binary tree T is a structure defined on a finite set of nodes that either
* contains no nodes, or
* is composed of three disjoint sets of nodes:
- a root... | instruction | 0 | 21,989 | 13 | 43,978 |
No | output | 1 | 21,989 | 13 | 43,979 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Binary trees are defined recursively. A binary tree T is a structure defined on a finite set of nodes that either
* contains no nodes, or
* is composed of three disjoint sets of nodes:
- a root... | instruction | 0 | 21,990 | 13 | 43,980 |
No | output | 1 | 21,990 | 13 | 43,981 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
The Main Martian Tree grows on Mars. It is a binary tree (a rooted tree, with no more than two sons at each vertex) with n vertices, where the root vertex has the number 1. Its fruits are the Ma... | instruction | 0 | 22,003 | 13 | 44,006 |
No | output | 1 | 22,003 | 13 | 44,007 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
The Main Martian Tree grows on Mars. It is a binary tree (a rooted tree, with no more than two sons at each vertex) with n vertices, where the root vertex has the number 1. Its fruits are the Ma... | instruction | 0 | 22,004 | 13 | 44,008 |
No | output | 1 | 22,004 | 13 | 44,009 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Eric is the teacher of graph theory class. Today, Eric teaches independent set and edge-induced subgraph.
Given a graph G=(V,E), an independent set is a subset of vertices V' ⊂ V such that for every pair u,v ∈ V', (u,v) not ∈ E (i.e. no edg... | instruction | 0 | 22,175 | 13 | 44,350 |
Tags: dfs and similar, dp, trees
Correct Solution:
```
import sys
input = sys.stdin.readline
n=int(input())
mod=998244353
E=[[] for i in range(n+1)]
for i in range(n-1):
x,y=map(int,input().split())
E[x].append(y)
E[y].append(x)
ROOT=1
QUE=[ROOT]
Parent=[-1]*(n+1)
Parent[ROOT]=n+1 # ROOTの親を定めておく.
TOP_S... | output | 1 | 22,175 | 13 | 44,351 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Eric is the teacher of graph theory class. Today, Eric teaches independent set and edge-induced subgraph.
Given a graph G=(V,E), an independent set is a subset of vertices V' ⊂ V such that for every pair u,v ∈ V', (u,v) not ∈ E (i.e. no edg... | instruction | 0 | 22,176 | 13 | 44,352 |
Tags: dfs and similar, dp, trees
Correct Solution:
```
import sys
readline = sys.stdin.readline
def ParentOrder(Edge, p):
N = len(Edge)
par = [0]*N
par[p] = -1
stack = [p]
order = []
visited = set([p])
ast = stack.append
apo = order.append
while stack:
vn = stack.pop()
... | output | 1 | 22,176 | 13 | 44,353 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Eric is the teacher of graph theory class. Today, Eric teaches independent set and edge-induced subgraph.
Given a graph G=(V,E), an independent set is a subset of vertices V' ⊂ V such that for every pair u,v ∈ V', (u,v) not ∈ E (i.e. no edg... | instruction | 0 | 22,177 | 13 | 44,354 |
Tags: dfs and similar, dp, trees
Correct Solution:
```
import sys
readline = sys.stdin.readline
def parorder(Edge, p):
N = len(Edge)
par = [0]*N
par[p] = -1
stack = [p]
order = []
visited = set([p])
ast = stack.append
apo = order.append
while stack:
vn = stack.pop()
... | output | 1 | 22,177 | 13 | 44,355 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Eric is the teacher of graph theory class. Today, Eric teaches independent set and edge-induced subgraph.
Given a graph G=(V,E), an independent set is a subset of vertices V' ⊂ V such that for ... | instruction | 0 | 22,178 | 13 | 44,356 |
No | output | 1 | 22,178 | 13 | 44,357 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Eric is the teacher of graph theory class. Today, Eric teaches independent set and edge-induced subgraph.
Given a graph G=(V,E), an independent set is a subset of vertices V' ⊂ V such that for ... | instruction | 0 | 22,179 | 13 | 44,358 |
No | output | 1 | 22,179 | 13 | 44,359 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Eric is the teacher of graph theory class. Today, Eric teaches independent set and edge-induced subgraph.
Given a graph G=(V,E), an independent set is a subset of vertices V' ⊂ V such that for ... | instruction | 0 | 22,180 | 13 | 44,360 |
No | output | 1 | 22,180 | 13 | 44,361 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
For a connected undirected weighted graph G, MST (minimum spanning tree) is a subgraph of G that contains all of G's vertices, is a tree, and sum of its edges is minimum possible.
You are given... | instruction | 0 | 22,579 | 13 | 45,158 |
No | output | 1 | 22,579 | 13 | 45,159 |
Provide a correct Python 3 solution for this coding contest problem.
There is a rooted tree (see Notes) with N vertices numbered 1 to N. Each of the vertices, except the root, has a directed edge coming from its parent. Note that the root may not be Vertex 1.
Takahashi has added M new directed edges to this graph. Ea... | instruction | 0 | 22,666 | 13 | 45,332 |
"Correct Solution:
```
# encoding: utf-8
N, M = map(int, input().split())
AB = [list(map(int, input().split())) for i in range(N + M - 1)]
# find start node
E = [[] for i in range(N)]
nE = [0] * N
for A, B in AB:
E[A - 1].append(B)
nE[B - 1] += 1
# print("#", E)
# print("#", nE)
S = []
for i in range(N):... | output | 1 | 22,666 | 13 | 45,333 |
Provide a correct Python 3 solution for this coding contest problem.
There is a rooted tree (see Notes) with N vertices numbered 1 to N. Each of the vertices, except the root, has a directed edge coming from its parent. Note that the root may not be Vertex 1.
Takahashi has added M new directed edges to this graph. Ea... | instruction | 0 | 22,667 | 13 | 45,334 |
"Correct Solution:
```
from collections import defaultdict, deque
N, M = map(int, input().split())
dic = defaultdict(list)
par = [0]*(N+1)
cnt = [0]*(N+1)
for i in range(N-1+M):
a, b = map(int, input().split())
dic[a] += [b]
cnt[b] += 1
for i in range(1,N+1):
if cnt[i]==0:
q = deque([i])
break
whil... | output | 1 | 22,667 | 13 | 45,335 |
Provide a correct Python 3 solution for this coding contest problem.
There is a rooted tree (see Notes) with N vertices numbered 1 to N. Each of the vertices, except the root, has a directed edge coming from its parent. Note that the root may not be Vertex 1.
Takahashi has added M new directed edges to this graph. Ea... | instruction | 0 | 22,668 | 13 | 45,336 |
"Correct Solution:
```
from collections import defaultdict, deque
def main():
N, M, *L = map(int, open(0).read().split())
dic = defaultdict(list)
par = [0]*N
cnt = [0]*(N+1)
for a,b in zip(*[iter(L)]*2):
dic[a] += [b]
cnt[b] += 1
for i in range(1,N+1):
if cnt[i]==0:
q = deque([i])
... | output | 1 | 22,668 | 13 | 45,337 |
Provide a correct Python 3 solution for this coding contest problem.
There is a rooted tree (see Notes) with N vertices numbered 1 to N. Each of the vertices, except the root, has a directed edge coming from its parent. Note that the root may not be Vertex 1.
Takahashi has added M new directed edges to this graph. Ea... | instruction | 0 | 22,669 | 13 | 45,338 |
"Correct Solution:
```
from collections import deque
N,M=map(int,input().split())
edges=[[] for _ in range(N)]
nps=[0]*N
for _ in range(N-1+M):
a,b=map(int,input().split())
edges[a-1].append(b-1)
nps[b-1]+=1
arr=[[]]
for i,np in enumerate(nps):
if np==0:
arr[-1].append(i)
while arr[-1]:
... | output | 1 | 22,669 | 13 | 45,339 |
Provide a correct Python 3 solution for this coding contest problem.
There is a rooted tree (see Notes) with N vertices numbered 1 to N. Each of the vertices, except the root, has a directed edge coming from its parent. Note that the root may not be Vertex 1.
Takahashi has added M new directed edges to this graph. Ea... | instruction | 0 | 22,670 | 13 | 45,340 |
"Correct Solution:
```
from collections import deque
readline = open(0).readline
N, M = map(int, readline().split())
deg = [0]*N
G = [[] for i in range(N)]
RG = [[] for i in range(N)]
for i in range(N-1+M):
a, b = map(int, readline().split())
deg[b-1] += 1
G[a-1].append(b-1)
RG[b-1].append(a-1)
que = ... | output | 1 | 22,670 | 13 | 45,341 |
Provide a correct Python 3 solution for this coding contest problem.
There is a rooted tree (see Notes) with N vertices numbered 1 to N. Each of the vertices, except the root, has a directed edge coming from its parent. Note that the root may not be Vertex 1.
Takahashi has added M new directed edges to this graph. Ea... | instruction | 0 | 22,671 | 13 | 45,342 |
"Correct Solution:
```
N,M = map(int,input().split())
# E[i]: 頂点iから伸びる頂点の集合
E = [[] for _ in range(N)]
# parent_cnt[i]: 頂点iの親
parent_cnt = [0] * N
for _ in range(N-1+M):
A,B = map(int,input().split())
E[A-1].append(B-1)
parent_cnt[B-1] += 1
# 根を見つける
for i,num in enumerate(parent_cnt):
if num == 0:
... | output | 1 | 22,671 | 13 | 45,343 |
Provide a correct Python 3 solution for this coding contest problem.
There is a rooted tree (see Notes) with N vertices numbered 1 to N. Each of the vertices, except the root, has a directed edge coming from its parent. Note that the root may not be Vertex 1.
Takahashi has added M new directed edges to this graph. Ea... | instruction | 0 | 22,672 | 13 | 45,344 |
"Correct Solution:
```
import sys
import heapq
sys.setrecursionlimit(2000000)
n,m = map(int,input().split())
g2 = [[] for i in range(n)]
g = [[] for i in range(n)]
for i in range(n-1+m):
a,b = map(int,input().split())
g2[b-1].append(a-1)
g[a-1].append(b-1)
for j in range(n):
if len(g2[j]... | output | 1 | 22,672 | 13 | 45,345 |
Provide a correct Python 3 solution for this coding contest problem.
There is a rooted tree (see Notes) with N vertices numbered 1 to N. Each of the vertices, except the root, has a directed edge coming from its parent. Note that the root may not be Vertex 1.
Takahashi has added M new directed edges to this graph. Ea... | instruction | 0 | 22,673 | 13 | 45,346 |
"Correct Solution:
```
import sys
input = sys.stdin.readline
N, M = map(int, input().split())
e_out = [[] for _ in range(N + 1)]
e_in = [[] for _ in range(N + 1)]
for _ in range(N + M - 1):
a, b = map(int, input().split())
e_out[a].append(b)
e_in[b].append(a)
# 1. 入次数が0のやつが親
# 2. 親が決まれば、そのこの入次数を減らす,1に戻る
... | output | 1 | 22,673 | 13 | 45,347 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a rooted tree (see Notes) with N vertices numbered 1 to N. Each of the vertices, except the root, has a directed edge coming from its parent. Note that the root may not be Vertex 1.
Ta... | instruction | 0 | 22,674 | 13 | 45,348 |
Yes | output | 1 | 22,674 | 13 | 45,349 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a rooted tree (see Notes) with N vertices numbered 1 to N. Each of the vertices, except the root, has a directed edge coming from its parent. Note that the root may not be Vertex 1.
Ta... | instruction | 0 | 22,675 | 13 | 45,350 |
Yes | output | 1 | 22,675 | 13 | 45,351 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a rooted tree (see Notes) with N vertices numbered 1 to N. Each of the vertices, except the root, has a directed edge coming from its parent. Note that the root may not be Vertex 1.
Ta... | instruction | 0 | 22,676 | 13 | 45,352 |
Yes | output | 1 | 22,676 | 13 | 45,353 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a rooted tree (see Notes) with N vertices numbered 1 to N. Each of the vertices, except the root, has a directed edge coming from its parent. Note that the root may not be Vertex 1.
Ta... | instruction | 0 | 22,677 | 13 | 45,354 |
Yes | output | 1 | 22,677 | 13 | 45,355 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a rooted tree (see Notes) with N vertices numbered 1 to N. Each of the vertices, except the root, has a directed edge coming from its parent. Note that the root may not be Vertex 1.
Ta... | instruction | 0 | 22,678 | 13 | 45,356 |
No | output | 1 | 22,678 | 13 | 45,357 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a rooted tree (see Notes) with N vertices numbered 1 to N. Each of the vertices, except the root, has a directed edge coming from its parent. Note that the root may not be Vertex 1.
Ta... | instruction | 0 | 22,679 | 13 | 45,358 |
No | output | 1 | 22,679 | 13 | 45,359 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a rooted tree (see Notes) with N vertices numbered 1 to N. Each of the vertices, except the root, has a directed edge coming from its parent. Note that the root may not be Vertex 1.
Ta... | instruction | 0 | 22,680 | 13 | 45,360 |
No | output | 1 | 22,680 | 13 | 45,361 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a rooted tree (see Notes) with N vertices numbered 1 to N. Each of the vertices, except the root, has a directed edge coming from its parent. Note that the root may not be Vertex 1.
Ta... | instruction | 0 | 22,681 | 13 | 45,362 |
No | output | 1 | 22,681 | 13 | 45,363 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a tree with N vertices. The vertices are numbered 0 through N-1, and the edges are numbered 1 through N-1. Edge i connects Vertex x_i and y_i, and has a value a_i. You can perform the following operation any number of times:
* Choose a... | instruction | 0 | 22,698 | 13 | 45,396 |
"Correct Solution:
```
from collections import Counter
from functools import reduce
from itertools import combinations
from operator import xor
n = int(input())
nodes = [0] * n
for _ in range(n - 1):
x, y, a = map(int, input().split())
nodes[x] ^= a
nodes[y] ^= a
c = Counter(nodes)
del c[0]
ans = 0
remain... | output | 1 | 22,698 | 13 | 45,397 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a tree with N vertices. The vertices are numbered 0 through N-1, and the edges are numbered 1 through N-1. Edge i connects Vertex x_i and y_i, and has a value a_i. You can perform the following operation any number of times:
* Choose a... | instruction | 0 | 22,699 | 13 | 45,398 |
"Correct Solution:
```
N = int(input())
B = [0]*N
for i in range(N-1):
x, y, a = map(int, input().split())
B[x] ^= a
B[y] ^= a
D = {}
for b in B:
D[b] = D.get(b, 0) + 1
D[0] = 0
ans = 0
first = 0
for b in D:
ans += D[b]//2
if D[b]%2:
first |= 1 << b
A = [0]*(1 << 16)
for i in range(1, 1... | output | 1 | 22,699 | 13 | 45,399 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a tree with N vertices. The vertices are numbered 0 through N-1, and the edges are numbered 1 through N-1. Edge i connects Vertex x_i and y_i, and has a value a_i. You can perform the following operation any number of times:
* Choose a... | instruction | 0 | 22,700 | 13 | 45,400 |
"Correct Solution:
```
from collections import Counter
from functools import reduce
from itertools import combinations
from operator import xor
n = int(input())
nodes = [0] * n
for _ in range(n - 1):
x, y, a = map(int, input().split())
nodes[x] ^= a
nodes[y] ^= a
c = Counter(nodes)
ans = 0
remains = set()... | output | 1 | 22,700 | 13 | 45,401 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a tree with N vertices. The vertices are numbered 0 through N-1, and the edges are numbered 1 through N-1. Edge i connects Vertex x_i and y_i, and has a value a_i. You can perform ... | instruction | 0 | 22,701 | 13 | 45,402 |
No | output | 1 | 22,701 | 13 | 45,403 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.