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.
You are given a tree (a connected undirected graph without cycles) of n vertices. Each of the n - 1 edges of the tree is colored in either black or red.
You are also given an integer k. Conside... | instruction | 0 | 6,626 | 13 | 13,252 |
No | output | 1 | 6,626 | 13 | 13,253 |
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 (a connected undirected graph without cycles) of n vertices. Each of the n - 1 edges of the tree is colored in either black or red.
You are also given an integer k. Conside... | instruction | 0 | 6,627 | 13 | 13,254 |
No | output | 1 | 6,627 | 13 | 13,255 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Iahub recently has learned Bubble Sort, an algorithm that is used to sort a permutation with n elements a1, a2, ..., an in ascending order. He is bored of this so simple algorithm, so he invents his own graph. The graph (let's call it G) ini... | instruction | 0 | 6,957 | 13 | 13,914 |
Tags: binary search, data structures, dp
Correct Solution:
```
import bisect
n=int(input())
a=list(map(int,input().split()))
INF=10**18
dp=[INF]*n
for i in range(n):
dp[bisect.bisect_left(dp,a[i])]=a[i]
print(bisect.bisect_left(dp,INF))
``` | output | 1 | 6,957 | 13 | 13,915 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Iahub recently has learned Bubble Sort, an algorithm that is used to sort a permutation with n elements a1, a2, ..., an in ascending order. He is bored of this so simple algorithm, so he invents his own graph. The graph (let's call it G) ini... | instruction | 0 | 6,958 | 13 | 13,916 |
Tags: binary search, data structures, dp
Correct Solution:
```
from bisect import bisect_right
def answer(n,A):
ans=[A[0]]
for i in range(1,n):
if ans[-1]<A[i]:
ans.append(A[i])
else:
index=bisect_right(ans,A[i])
ans[index]=A[i]
return len(ans... | output | 1 | 6,958 | 13 | 13,917 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Iahub recently has learned Bubble Sort, an algorithm that is used to sort a permutation with n elements a1, a2, ..., an in ascending order. He is bored of this so simple algorithm, so he invents his own graph. The graph (let's call it G) ini... | instruction | 0 | 6,959 | 13 | 13,918 |
Tags: binary search, data structures, dp
Correct Solution:
```
def lis(a):
b = []
for c in a:
# if len(b) == 0 or c > b[-1]
if len(b) == 0 or c > b[-1]:
b.append(c)
else:
l = 0
r = len(b)
while l < r-1:
m = l+r>>1
... | output | 1 | 6,959 | 13 | 13,919 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Iahub recently has learned Bubble Sort, an algorithm that is used to sort a permutation with n elements a1, a2, ..., an in ascending order. He is bored of this so simple algorithm, so he invents his own graph. The graph (let's call it G) ini... | instruction | 0 | 6,960 | 13 | 13,920 |
Tags: binary search, data structures, dp
Correct Solution:
```
import sys,math as mt
import heapq as hp
import collections as cc
import math as mt
import itertools as it
input=sys.stdin.readline
I=lambda:list(map(int,input().split()))
def CeilIndex(A, l, r, key):
while (r - l > 1):
m = l + (r - l)/... | output | 1 | 6,960 | 13 | 13,921 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Iahub recently has learned Bubble Sort, an algorithm that is used to sort a permutation with n elements a1, a2, ..., an in ascending order. He is bored of this so simple algorithm, so he invents his own graph. The graph (let's call it G) ini... | instruction | 0 | 6,961 | 13 | 13,922 |
Tags: binary search, data structures, dp
Correct Solution:
```
import sys; sys.setrecursionlimit(1000000)
def solve():
# 3 1 2 4
# 1 2 3 4
# 2 1 3 5 4
# 1 2 3 4 5
n, = rv()
a, = rl(1)
# 3 1 2 7 4 6 5
# [ , 1 , , , , ]
# [ , 1 , 2 , , , ]
# [ , 1 , 2 , 4, 5, ]
mem = [1... | output | 1 | 6,961 | 13 | 13,923 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Iahub recently has learned Bubble Sort, an algorithm that is used to sort a permutation with n elements a1, a2, ..., an in ascending order. He is bored of this so simple algorithm, so he invents his own graph. The graph (let's call it G) ini... | instruction | 0 | 6,962 | 13 | 13,924 |
Tags: binary search, data structures, dp
Correct Solution:
```
def CeilIndex(A, l, r, key):
while (r - l > 1):
m = l + (r - l)//2
if (A[m] >= key):
r = m
else:
l = m
return r
def LongestIncreasingSubsequenceLength(A, size):
# Add bound... | output | 1 | 6,962 | 13 | 13,925 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Iahub recently has learned Bubble Sort, an algorithm that is used to sort a permutation with n elements a1, a2, ..., an in ascending order. He is bored of this so simple algorithm, so he invents his own graph. The graph (let's call it G) ini... | instruction | 0 | 6,963 | 13 | 13,926 |
Tags: binary search, data structures, dp
Correct Solution:
```
n = int(input())
num_list = list(map(int, input().split()))
# def lower_bound(min_lis, x):
# #goal return the position of the first element >= x
# left = 0
# right = len(min_lis) - 1
# res = -1
# while left <= right:
# mid = (l... | output | 1 | 6,963 | 13 | 13,927 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Iahub recently has learned Bubble Sort, an algorithm that is used to sort a permutation with n elements a1, a2, ..., an in ascending order. He is bored of this so simple algorithm, so he invents his own graph. The graph (let's call it G) ini... | instruction | 0 | 6,964 | 13 | 13,928 |
Tags: binary search, data structures, dp
Correct Solution:
```
MXusl = int
MXuso = input
MXusL = map
MXusr = min
MXusI = print
n = MXusl(MXuso())
a = [1e6] * (n + 1)
s = 1
for x in MXusL(MXusl, MXuso().split()):
l = 0
r = s
while r-l > 1:
m = (l + r) >> 1
if a[m] < x:
l = m
... | output | 1 | 6,964 | 13 | 13,929 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Iahub recently has learned Bubble Sort, an algorithm that is used to sort a permutation with n elements a1, a2, ..., an in ascending order. He is bored of this so simple algorithm, so he invents... | instruction | 0 | 6,965 | 13 | 13,930 |
Yes | output | 1 | 6,965 | 13 | 13,931 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Iahub recently has learned Bubble Sort, an algorithm that is used to sort a permutation with n elements a1, a2, ..., an in ascending order. He is bored of this so simple algorithm, so he invents... | instruction | 0 | 6,966 | 13 | 13,932 |
Yes | output | 1 | 6,966 | 13 | 13,933 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Iahub recently has learned Bubble Sort, an algorithm that is used to sort a permutation with n elements a1, a2, ..., an in ascending order. He is bored of this so simple algorithm, so he invents... | instruction | 0 | 6,967 | 13 | 13,934 |
Yes | output | 1 | 6,967 | 13 | 13,935 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Iahub recently has learned Bubble Sort, an algorithm that is used to sort a permutation with n elements a1, a2, ..., an in ascending order. He is bored of this so simple algorithm, so he invents... | instruction | 0 | 6,968 | 13 | 13,936 |
Yes | output | 1 | 6,968 | 13 | 13,937 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Iahub recently has learned Bubble Sort, an algorithm that is used to sort a permutation with n elements a1, a2, ..., an in ascending order. He is bored of this so simple algorithm, so he invents... | instruction | 0 | 6,969 | 13 | 13,938 |
No | output | 1 | 6,969 | 13 | 13,939 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Iahub recently has learned Bubble Sort, an algorithm that is used to sort a permutation with n elements a1, a2, ..., an in ascending order. He is bored of this so simple algorithm, so he invents... | instruction | 0 | 6,970 | 13 | 13,940 |
No | output | 1 | 6,970 | 13 | 13,941 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Iahub recently has learned Bubble Sort, an algorithm that is used to sort a permutation with n elements a1, a2, ..., an in ascending order. He is bored of this so simple algorithm, so he invents... | instruction | 0 | 6,971 | 13 | 13,942 |
No | output | 1 | 6,971 | 13 | 13,943 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Iahub recently has learned Bubble Sort, an algorithm that is used to sort a permutation with n elements a1, a2, ..., an in ascending order. He is bored of this so simple algorithm, so he invents... | instruction | 0 | 6,972 | 13 | 13,944 |
No | output | 1 | 6,972 | 13 | 13,945 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Mr. Kitayuta has just bought an undirected graph consisting of n vertices and m edges. The vertices of the graph are numbered from 1 to n. Each edge, namely edge i, has a color ci, connecting vertex ai and bi.
Mr. Kitayuta wants you to proc... | instruction | 0 | 7,058 | 13 | 14,116 |
Tags: dfs and similar, dp, dsu, graphs
Correct Solution:
```
def dfs_paths(graph, start, goal, path=list()):
if not path:
path.append(start)
if start == goal:
yield path
for vertex in graph[start] - set(path):
yield from dfs_paths(graph, vertex, goal, path=path + [vertex])
n, m = ma... | output | 1 | 7,058 | 13 | 14,117 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Mr. Kitayuta has just bought an undirected graph consisting of n vertices and m edges. The vertices of the graph are numbered from 1 to n. Each edge, namely edge i, has a color ci, connecting vertex ai and bi.
Mr. Kitayuta wants you to proc... | instruction | 0 | 7,059 | 13 | 14,118 |
Tags: dfs and similar, dp, dsu, graphs
Correct Solution:
```
class Solution:
def __init__(self, n, m, edges):
self.n = n
self.m = m
self.edges = [[[] for _ in range(m+1)] for _ in range(n+1)]
for _from, _to, _color in edges:
self.edges[_from][_color].append(_to)
... | output | 1 | 7,059 | 13 | 14,119 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Mr. Kitayuta has just bought an undirected graph consisting of n vertices and m edges. The vertices of the graph are numbered from 1 to n. Each edge, namely edge i, has a color ci, connecting vertex ai and bi.
Mr. Kitayuta wants you to proc... | instruction | 0 | 7,060 | 13 | 14,120 |
Tags: dfs and similar, dp, dsu, graphs
Correct Solution:
```
import sys
from collections import defaultdict
from functools import lru_cache
from collections import Counter
def mi(s):
return map(int, s.strip().split())
def lmi(s):
return list(mi(s))
def mf(f, s):
return map(f, s)
def lmf(f, s):
retur... | output | 1 | 7,060 | 13 | 14,121 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Mr. Kitayuta has just bought an undirected graph consisting of n vertices and m edges. The vertices of the graph are numbered from 1 to n. Each edge, namely edge i, has a color ci, connecting vertex ai and bi.
Mr. Kitayuta wants you to proc... | instruction | 0 | 7,061 | 13 | 14,122 |
Tags: dfs and similar, dp, dsu, graphs
Correct Solution:
```
class CodeforcesTask505BSolution:
def __init__(self):
self.result = ''
self.n_m = []
self.edges = []
self.q = 0
self.queries = []
def read_input(self):
self.n_m = [int(x) for x in input().split(" ")]
... | output | 1 | 7,061 | 13 | 14,123 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Mr. Kitayuta has just bought an undirected graph consisting of n vertices and m edges. The vertices of the graph are numbered from 1 to n. Each edge, namely edge i, has a color ci, connecting vertex ai and bi.
Mr. Kitayuta wants you to proc... | instruction | 0 | 7,062 | 13 | 14,124 |
Tags: dfs and similar, dp, dsu, graphs
Correct Solution:
```
class Graph(object):
def __init__(self, num_nodes):
self.num_nodes = num_nodes
self.adj_list = {}
def __add_directional_edge(self, a, b, c):
if a in self.adj_list:
if b in self.adj_list[a]:
if c not... | output | 1 | 7,062 | 13 | 14,125 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Mr. Kitayuta has just bought an undirected graph consisting of n vertices and m edges. The vertices of the graph are numbered from 1 to n. Each edge, namely edge i, has a color ci, connecting vertex ai and bi.
Mr. Kitayuta wants you to proc... | instruction | 0 | 7,063 | 13 | 14,126 |
Tags: dfs and similar, dp, dsu, graphs
Correct Solution:
```
from collections import defaultdict
def DFS(d,a,visited):
visited[a] = 1
if a in d:
for i in d[a]:
if visited[i] == 1:
continue
else:
DFS(d,i,visited)
n,m = map(int,input().split())
l = [defaultdict(list) for i in range(m+1)]
for i in... | output | 1 | 7,063 | 13 | 14,127 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Mr. Kitayuta has just bought an undirected graph consisting of n vertices and m edges. The vertices of the graph are numbered from 1 to n. Each edge, namely edge i, has a color ci, connecting vertex ai and bi.
Mr. Kitayuta wants you to proc... | instruction | 0 | 7,064 | 13 | 14,128 |
Tags: dfs and similar, dp, dsu, graphs
Correct Solution:
```
n,m=map(int,input().split())
g=[[] for _ in range(n)]
for _ in range(m):
a,b,c=map(int,input().split())
g[a-1].append((b-1,c-1))
g[b-1].append((a-1,c-1))
def dfs(x,c,t):
if x==t:return True
v[x]=1
for j in g[x]:
if j[1]==c and ... | output | 1 | 7,064 | 13 | 14,129 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Mr. Kitayuta has just bought an undirected graph consisting of n vertices and m edges. The vertices of the graph are numbered from 1 to n. Each edge, namely edge i, has a color ci, connecting vertex ai and bi.
Mr. Kitayuta wants you to proc... | instruction | 0 | 7,065 | 13 | 14,130 |
Tags: dfs and similar, dp, dsu, graphs
Correct Solution:
```
def get_connected_matrix(adjacency_matrix):
n = len(adjacency_matrix)
non_visited_vertices = set(i for i in range(n))
cluster_numbers = [0] * n
cluster_number = 1
def traverse(u):
non_visited_vertices.remove(u)
cluster_num... | output | 1 | 7,065 | 13 | 14,131 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Mr. Kitayuta has just bought an undirected graph consisting of n vertices and m edges. The vertices of the graph are numbered from 1 to n. Each edge, namely edge i, has a color ci, connecting ve... | instruction | 0 | 7,066 | 13 | 14,132 |
Yes | output | 1 | 7,066 | 13 | 14,133 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Mr. Kitayuta has just bought an undirected graph consisting of n vertices and m edges. The vertices of the graph are numbered from 1 to n. Each edge, namely edge i, has a color ci, connecting ve... | instruction | 0 | 7,067 | 13 | 14,134 |
Yes | output | 1 | 7,067 | 13 | 14,135 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Mr. Kitayuta has just bought an undirected graph consisting of n vertices and m edges. The vertices of the graph are numbered from 1 to n. Each edge, namely edge i, has a color ci, connecting ve... | instruction | 0 | 7,068 | 13 | 14,136 |
Yes | output | 1 | 7,068 | 13 | 14,137 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Mr. Kitayuta has just bought an undirected graph consisting of n vertices and m edges. The vertices of the graph are numbered from 1 to n. Each edge, namely edge i, has a color ci, connecting ve... | instruction | 0 | 7,069 | 13 | 14,138 |
Yes | output | 1 | 7,069 | 13 | 14,139 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Mr. Kitayuta has just bought an undirected graph consisting of n vertices and m edges. The vertices of the graph are numbered from 1 to n. Each edge, namely edge i, has a color ci, connecting ve... | instruction | 0 | 7,070 | 13 | 14,140 |
No | output | 1 | 7,070 | 13 | 14,141 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Mr. Kitayuta has just bought an undirected graph consisting of n vertices and m edges. The vertices of the graph are numbered from 1 to n. Each edge, namely edge i, has a color ci, connecting ve... | instruction | 0 | 7,071 | 13 | 14,142 |
No | output | 1 | 7,071 | 13 | 14,143 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Mr. Kitayuta has just bought an undirected graph consisting of n vertices and m edges. The vertices of the graph are numbered from 1 to n. Each edge, namely edge i, has a color ci, connecting ve... | instruction | 0 | 7,072 | 13 | 14,144 |
No | output | 1 | 7,072 | 13 | 14,145 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Mr. Kitayuta has just bought an undirected graph consisting of n vertices and m edges. The vertices of the graph are numbered from 1 to n. Each edge, namely edge i, has a color ci, connecting ve... | instruction | 0 | 7,073 | 13 | 14,146 |
No | output | 1 | 7,073 | 13 | 14,147 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A tree is an undirected connected graph without cycles.
Let's consider a rooted undirected tree with n vertices, numbered 1 through n. There are many ways to represent such a tree. One way is to create an array with n integers p1, p2, ..., ... | instruction | 0 | 7,143 | 13 | 14,286 |
Tags: constructive algorithms, dfs and similar, dsu, graphs, trees
Correct Solution:
```
from collections import deque
# ver si hay un camino que llega a el a partir
# de su padre entonces hay un ciclo
def Padre(x, padre):
while x != padre[x]:
x = padre[x]
return x
def DFS(x, color, padre, ciclos,... | output | 1 | 7,143 | 13 | 14,287 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A tree is an undirected connected graph without cycles.
Let's consider a rooted undirected tree with n vertices, numbered 1 through n. There are many ways to represent such a tree. One way is to create an array with n integers p1, p2, ..., ... | instruction | 0 | 7,144 | 13 | 14,288 |
Tags: constructive algorithms, dfs and similar, dsu, graphs, trees
Correct Solution:
```
from collections import deque
# Para revisar la correctitud pueden probar el codigo en el codeforce que va a dar accepted
# ver si hay un camino que llega a el a partir
# de su padre entonces hay un ciclo
def Padre(x, padre):
... | output | 1 | 7,144 | 13 | 14,289 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A tree is an undirected connected graph without cycles.
Let's consider a rooted undirected tree with n vertices, numbered 1 through n. There are many ways to represent such a tree. One way is to create an array with n integers p1, p2, ..., ... | instruction | 0 | 7,145 | 13 | 14,290 |
Tags: constructive algorithms, dfs and similar, dsu, graphs, trees
Correct Solution:
```
tree_size = int(input())
parents = [int(x)-1 for x in input().split(' ')]
num_changes = 0
root = tree_size
for node, parent in enumerate(parents):
if parent == node:
root = node
break
visited = set()
finished = set()
vi... | output | 1 | 7,145 | 13 | 14,291 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A tree is an undirected connected graph without cycles.
Let's consider a rooted undirected tree with n vertices, numbered 1 through n. There are many ways to represent such a tree. One way is to create an array with n integers p1, p2, ..., ... | instruction | 0 | 7,146 | 13 | 14,292 |
Tags: constructive algorithms, dfs and similar, dsu, graphs, trees
Correct Solution:
```
n = int(input())
arr = list(map(int, input().split(' ')))
root=-1
for i,a in enumerate(arr) :
if i == a-1 :
root = i
break
v = [False]*len(arr)
if root>-1 :
v[root]=True
ans = 0
for i,a in enumerate(arr) :
... | output | 1 | 7,146 | 13 | 14,293 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A tree is an undirected connected graph without cycles.
Let's consider a rooted undirected tree with n vertices, numbered 1 through n. There are many ways to represent such a tree. One way is to create an array with n integers p1, p2, ..., ... | instruction | 0 | 7,147 | 13 | 14,294 |
Tags: constructive algorithms, dfs and similar, dsu, graphs, trees
Correct Solution:
```
# Why do we fall ? So we can learn to pick ourselves up.
root = -1
def find(i,time):
parent[i] = time
while not parent[aa[i]]:
i = aa[i]
parent[i] = time
# print(parent,"in",i)
if parent[aa[i]... | output | 1 | 7,147 | 13 | 14,295 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A tree is an undirected connected graph without cycles.
Let's consider a rooted undirected tree with n vertices, numbered 1 through n. There are many ways to represent such a tree. One way is to create an array with n integers p1, p2, ..., ... | instruction | 0 | 7,148 | 13 | 14,296 |
Tags: constructive algorithms, dfs and similar, dsu, graphs, trees
Correct Solution:
```
# from debug import debug
import sys; input = sys.stdin.readline
n = int(input())
lis = [0, *map(int , input().split())]
v = [0]*(n+1)
cycles = set()
roots = set()
for i in range(1, n+1):
if v[i] == 0:
node = i
while v[node] =... | output | 1 | 7,148 | 13 | 14,297 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A tree is an undirected connected graph without cycles.
Let's consider a rooted undirected tree with n vertices, numbered 1 through n. There are many ways to represent such a tree. One way is to create an array with n integers p1, p2, ..., ... | instruction | 0 | 7,149 | 13 | 14,298 |
Tags: constructive algorithms, dfs and similar, dsu, graphs, trees
Correct Solution:
```
# [https://codeforces.com/contest/698/submission/42129034]
input()
A = list(map(int, input().split(' ')))
root = -1
for i,a in enumerate(A) :
if i == a-1 :
root = i
break
v = [False]*len(A)
if root>-1 :... | output | 1 | 7,149 | 13 | 14,299 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A tree is an undirected connected graph without cycles.
Let's consider a rooted undirected tree with n vertices, numbered 1 through n. There are many ways to represent such a tree. One way is to create an array with n integers p1, p2, ..., ... | instruction | 0 | 7,150 | 13 | 14,300 |
Tags: constructive algorithms, dfs and similar, dsu, graphs, trees
Correct Solution:
```
input()
A = list(map(int, input().split(' ')))
root = -1
for i,a in enumerate(A) :
if i == a-1 :
root = i
break
v = [False]*len(A)
if root>-1 :
v[root]=True
changed = 0
for i,a in enumerate(A) ... | output | 1 | 7,150 | 13 | 14,301 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A tree is an undirected connected graph without cycles.
Let's consider a rooted undirected tree with n vertices, numbered 1 through n. There are many ways to represent such a tree. One way is t... | instruction | 0 | 7,151 | 13 | 14,302 |
Yes | output | 1 | 7,151 | 13 | 14,303 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A tree is an undirected connected graph without cycles.
Let's consider a rooted undirected tree with n vertices, numbered 1 through n. There are many ways to represent such a tree. One way is t... | instruction | 0 | 7,152 | 13 | 14,304 |
Yes | output | 1 | 7,152 | 13 | 14,305 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A tree is an undirected connected graph without cycles.
Let's consider a rooted undirected tree with n vertices, numbered 1 through n. There are many ways to represent such a tree. One way is t... | instruction | 0 | 7,153 | 13 | 14,306 |
No | output | 1 | 7,153 | 13 | 14,307 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A tree is an undirected connected graph without cycles.
Let's consider a rooted undirected tree with n vertices, numbered 1 through n. There are many ways to represent such a tree. One way is t... | instruction | 0 | 7,154 | 13 | 14,308 |
No | output | 1 | 7,154 | 13 | 14,309 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A tree is an undirected connected graph without cycles.
Let's consider a rooted undirected tree with n vertices, numbered 1 through n. There are many ways to represent such a tree. One way is t... | instruction | 0 | 7,155 | 13 | 14,310 |
No | output | 1 | 7,155 | 13 | 14,311 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A tree is an undirected connected graph without cycles.
Let's consider a rooted undirected tree with n vertices, numbered 1 through n. There are many ways to represent such a tree. One way is t... | instruction | 0 | 7,156 | 13 | 14,312 |
No | output | 1 | 7,156 | 13 | 14,313 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Little Timofey has a big tree — an undirected connected graph with n vertices and no simple cycles. He likes to walk along it. His tree is flat so when he walks along it he sees it entirely. Qui... | instruction | 0 | 7,173 | 13 | 14,346 |
No | output | 1 | 7,173 | 13 | 14,347 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a connected undirected graph with n vertices and m edges. The vertices are enumerated from 1 to n.
You are given n integers c1, c2, ..., cn, each of them is between - n and n, inclusive. It is also guaranteed that the parity... | instruction | 0 | 7,232 | 13 | 14,464 |
Tags: constructive algorithms, dfs and similar, graphs
Correct Solution:
```
def divisors(M):
d=[]
i=1
while M>=i**2:
if M%i==0:
d.append(i)
if i**2!=M:
d.append(M//i)
i=i+1
return d
def popcount(x):
x = x - ((x >> 1) & 0x55555555)
x = (x... | output | 1 | 7,232 | 13 | 14,465 |
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