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.
We have N points numbered 1 to N arranged in a line in this order.
Takahashi decides to make an undirected graph, using these points as the vertices. In the beginning, the graph has no edge. Takahashi will do M operations to add edges in this graph.... | instruction | 0 | 28,053 | 13 | 56,106 |
"Correct Solution:
```
N,M = map(int, input().split())
E = [[int(e) for e in input().split()] for _ in range(M)]
E.sort()
inf = 10**15
seg = [inf]*(2*N-1)
def update(k, x):
k += N-1
seg[k] = x
while k:
k = (k-1)//2
seg[k] = min(seg[2*k+1], seg[2*k+2])
def query(p, q):
p += N-1... | output | 1 | 28,053 | 13 | 56,107 |
Provide a correct Python 3 solution for this coding contest problem.
We have N points numbered 1 to N arranged in a line in this order.
Takahashi decides to make an undirected graph, using these points as the vertices. In the beginning, the graph has no edge. Takahashi will do M operations to add edges in this graph.... | instruction | 0 | 28,054 | 13 | 56,108 |
"Correct Solution:
```
class SegTree:
def __init__(self, N):
self.N = N
self._N = 1<<((N-1).bit_length())
self.node = [10**15]*(2*self._N-1)
self.node[self._N-1] = 0
def eval(self,p):
i = p + self._N-1
cur = self.node[i]
while i:
i = (i-1) // ... | output | 1 | 28,054 | 13 | 56,109 |
Provide a correct Python 3 solution for this coding contest problem.
We have N points numbered 1 to N arranged in a line in this order.
Takahashi decides to make an undirected graph, using these points as the vertices. In the beginning, the graph has no edge. Takahashi will do M operations to add edges in this graph.... | instruction | 0 | 28,055 | 13 | 56,110 |
"Correct Solution:
```
import sys
input = sys.stdin.readline
import heapq
def dijkstra(start, edge):
n = len(edge)
dist = [float("inf")]*n
dist[start] = 0
que = [(0, start)]
while que:
d, v = heapq.heappop(que)
if dist[v] < d:
continue
for nv, nd in edge[v]:
... | output | 1 | 28,055 | 13 | 56,111 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
We have N points numbered 1 to N arranged in a line in this order.
Takahashi decides to make an undirected graph, using these points as the vertices. In the beginning, the graph has no edge. Ta... | instruction | 0 | 28,056 | 13 | 56,112 |
Yes | output | 1 | 28,056 | 13 | 56,113 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
We have N points numbered 1 to N arranged in a line in this order.
Takahashi decides to make an undirected graph, using these points as the vertices. In the beginning, the graph has no edge. Ta... | instruction | 0 | 28,057 | 13 | 56,114 |
Yes | output | 1 | 28,057 | 13 | 56,115 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
We have N points numbered 1 to N arranged in a line in this order.
Takahashi decides to make an undirected graph, using these points as the vertices. In the beginning, the graph has no edge. Ta... | instruction | 0 | 28,058 | 13 | 56,116 |
Yes | output | 1 | 28,058 | 13 | 56,117 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
We have N points numbered 1 to N arranged in a line in this order.
Takahashi decides to make an undirected graph, using these points as the vertices. In the beginning, the graph has no edge. Ta... | instruction | 0 | 28,059 | 13 | 56,118 |
Yes | output | 1 | 28,059 | 13 | 56,119 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
We have N points numbered 1 to N arranged in a line in this order.
Takahashi decides to make an undirected graph, using these points as the vertices. In the beginning, the graph has no edge. Ta... | instruction | 0 | 28,060 | 13 | 56,120 |
No | output | 1 | 28,060 | 13 | 56,121 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
We have N points numbered 1 to N arranged in a line in this order.
Takahashi decides to make an undirected graph, using these points as the vertices. In the beginning, the graph has no edge. Ta... | instruction | 0 | 28,061 | 13 | 56,122 |
No | output | 1 | 28,061 | 13 | 56,123 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
We have N points numbered 1 to N arranged in a line in this order.
Takahashi decides to make an undirected graph, using these points as the vertices. In the beginning, the graph has no edge. Ta... | instruction | 0 | 28,062 | 13 | 56,124 |
No | output | 1 | 28,062 | 13 | 56,125 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
We have N points numbered 1 to N arranged in a line in this order.
Takahashi decides to make an undirected graph, using these points as the vertices. In the beginning, the graph has no edge. Ta... | instruction | 0 | 28,063 | 13 | 56,126 |
No | output | 1 | 28,063 | 13 | 56,127 |
Provide a correct Python 3 solution for this coding contest problem.
There is a connected undirected graph with N vertices and M edges. The vertices are numbered 1 to N, and the edges are numbered 1 to M. Also, each of these vertices and edges has a specified weight. Vertex i has a weight of X_i; Edge i has a weight o... | instruction | 0 | 28,080 | 13 | 56,160 |
"Correct Solution:
```
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
import operator
N,M = map(int,readline().split())
X = list(map(int,readline().split()))
m = map(int,read().split())
ABY = list(zip(m,m,m))
# 併合を表す木を作成
# 作成可能な頂点がある
# 作成可能な頂点から降りて... | output | 1 | 28,080 | 13 | 56,161 |
Provide a correct Python 3 solution for this coding contest problem.
There is a connected undirected graph with N vertices and M edges. The vertices are numbered 1 to N, and the edges are numbered 1 to M. Also, each of these vertices and edges has a specified weight. Vertex i has a weight of X_i; Edge i has a weight o... | instruction | 0 | 28,081 | 13 | 56,162 |
"Correct Solution:
```
from collections import deque
import operator
N, M = map(int, input().split())
*X, = map(int, input().split())
E = []
for i in range(M):
a, b, y = map(int, input().split())
E.append((y, a-1, b-1))
E.sort()
*Y, = map(operator.itemgetter(0), E)
*p, = range(N)
def root(x):
if x == p[x]... | output | 1 | 28,081 | 13 | 56,163 |
Provide a correct Python 3 solution for this coding contest problem.
There is a connected undirected graph with N vertices and M edges. The vertices are numbered 1 to N, and the edges are numbered 1 to M. Also, each of these vertices and edges has a specified weight. Vertex i has a weight of X_i; Edge i has a weight o... | instruction | 0 | 28,082 | 13 | 56,164 |
"Correct Solution:
```
from sys import exit, setrecursionlimit, stderr
from functools import reduce
from itertools import *
from collections import defaultdict, Counter
from bisect import *
setrecursionlimit(10**7)
def read():
return int(input())
def reads():
return [int(x) for x in input().split()]
class union... | output | 1 | 28,082 | 13 | 56,165 |
Provide a correct Python 3 solution for this coding contest problem.
There is a connected undirected graph with N vertices and M edges. The vertices are numbered 1 to N, and the edges are numbered 1 to M. Also, each of these vertices and edges has a specified weight. Vertex i has a weight of X_i; Edge i has a weight o... | instruction | 0 | 28,083 | 13 | 56,166 |
"Correct Solution:
```
import sys
class UnionFind():
def __init__(self, num, V):
self.par = [-1]*num
#self.size = [1]*num
self.unused = [0]*num
self.cost = V
def find(self, x):
if self.par[x] < 0:
return x
else:
x = self.par[x]
... | output | 1 | 28,083 | 13 | 56,167 |
Provide a correct Python 3 solution for this coding contest problem.
There is a connected undirected graph with N vertices and M edges. The vertices are numbered 1 to N, and the edges are numbered 1 to M. Also, each of these vertices and edges has a specified weight. Vertex i has a weight of X_i; Edge i has a weight o... | instruction | 0 | 28,084 | 13 | 56,168 |
"Correct Solution:
```
class UnionFind():
# 作りたい要素数nで初期化
def __init__(self, n):
self.n = n
self.root = [-1]*(n+1)
self.rnk = [0]*(n+1)
# ノードxのrootノードを見つける
def Find_Root(self, x):
if(self.root[x] < 0):
return x
else:
self.root[x] = self.Fin... | output | 1 | 28,084 | 13 | 56,169 |
Provide a correct Python 3 solution for this coding contest problem.
There is a connected undirected graph with N vertices and M edges. The vertices are numbered 1 to N, and the edges are numbered 1 to M. Also, each of these vertices and edges has a specified weight. Vertex i has a weight of X_i; Edge i has a weight o... | instruction | 0 | 28,085 | 13 | 56,170 |
"Correct Solution:
```
import sys
input = sys.stdin.readline
class UnionFind:
def __init__(self, N):
self.par = [-1] * N
def find(self, x):
r = x
while self.par[r] >= 0:
r = self.par[r]
while x != r:
tmp = self.par[x]
self.par[x] = r
... | output | 1 | 28,085 | 13 | 56,171 |
Provide a correct Python 3 solution for this coding contest problem.
There is a connected undirected graph with N vertices and M edges. The vertices are numbered 1 to N, and the edges are numbered 1 to M. Also, each of these vertices and edges has a specified weight. Vertex i has a weight of X_i; Edge i has a weight o... | instruction | 0 | 28,086 | 13 | 56,172 |
"Correct Solution:
```
import sys
from collections import Counter
input = sys.stdin.readline
N, M = map(int, input().split())
a = list(map(int, input().split()))
e = []
ee = [[] for _ in range(N + 1)]
for _ in range(M):
u, v, c = map(int, input().split())
e.append((c, u, v))
ee[u].append((v, c))
ee[v].append((u... | output | 1 | 28,086 | 13 | 56,173 |
Provide a correct Python 3 solution for this coding contest problem.
There is a connected undirected graph with N vertices and M edges. The vertices are numbered 1 to N, and the edges are numbered 1 to M. Also, each of these vertices and edges has a specified weight. Vertex i has a weight of X_i; Edge i has a weight o... | instruction | 0 | 28,087 | 13 | 56,174 |
"Correct Solution:
```
import sys
from collections import deque
input = sys.stdin.readline
N,M=map(int,input().split())
X=list(map(int,input().split()))
EDGE=[list(map(int,input().split())) for i in range(M)]
EDGE.sort(key=lambda x:x[2])
EDGELIST=[[] for i in range(N+1)]
for i in range(M):
x,y,w=EDGE[i]
EDGEL... | output | 1 | 28,087 | 13 | 56,175 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a connected undirected graph with N vertices and M edges. The vertices are numbered 1 to N, and the edges are numbered 1 to M. Also, each of these vertices and edges has a specified wei... | instruction | 0 | 28,088 | 13 | 56,176 |
Yes | output | 1 | 28,088 | 13 | 56,177 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a connected undirected graph with N vertices and M edges. The vertices are numbered 1 to N, and the edges are numbered 1 to M. Also, each of these vertices and edges has a specified wei... | instruction | 0 | 28,089 | 13 | 56,178 |
Yes | output | 1 | 28,089 | 13 | 56,179 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a connected undirected graph with N vertices and M edges. The vertices are numbered 1 to N, and the edges are numbered 1 to M. Also, each of these vertices and edges has a specified wei... | instruction | 0 | 28,090 | 13 | 56,180 |
Yes | output | 1 | 28,090 | 13 | 56,181 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a connected undirected graph with N vertices and M edges. The vertices are numbered 1 to N, and the edges are numbered 1 to M. Also, each of these vertices and edges has a specified wei... | instruction | 0 | 28,091 | 13 | 56,182 |
Yes | output | 1 | 28,091 | 13 | 56,183 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a connected undirected graph with N vertices and M edges. The vertices are numbered 1 to N, and the edges are numbered 1 to M. Also, each of these vertices and edges has a specified wei... | instruction | 0 | 28,092 | 13 | 56,184 |
No | output | 1 | 28,092 | 13 | 56,185 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a connected undirected graph with N vertices and M edges. The vertices are numbered 1 to N, and the edges are numbered 1 to M. Also, each of these vertices and edges has a specified wei... | instruction | 0 | 28,093 | 13 | 56,186 |
No | output | 1 | 28,093 | 13 | 56,187 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a connected undirected graph with N vertices and M edges. The vertices are numbered 1 to N, and the edges are numbered 1 to M. Also, each of these vertices and edges has a specified wei... | instruction | 0 | 28,094 | 13 | 56,188 |
No | output | 1 | 28,094 | 13 | 56,189 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
There is a connected undirected graph with N vertices and M edges. The vertices are numbered 1 to N, and the edges are numbered 1 to M. Also, each of these vertices and edges has a specified wei... | instruction | 0 | 28,095 | 13 | 56,190 |
No | output | 1 | 28,095 | 13 | 56,191 |
Provide a correct Python 3 solution for this coding contest problem.
We have a tree with N vertices. Vertex 1 is the root of the tree, and the parent of Vertex i (2 \leq i \leq N) is Vertex P_i.
To each vertex in the tree, Snuke will allocate a color, either black or white, and a non-negative integer weight.
Snuke h... | instruction | 0 | 28,114 | 13 | 56,228 |
"Correct Solution:
```
n = int(input())
P = list(map(int, input().split()))
X = list(map(int, input().split()))
dp = [0] * n
child = [[] for i in range(n)]
for i in range(n-1):
child[P[i] - 1].append(i + 1)
for i in range(n-1, -1, -1):
if not child[i]:
dp[i] = 0
else:
child_sum_min = 0
... | output | 1 | 28,114 | 13 | 56,229 |
Provide a correct Python 3 solution for this coding contest problem.
We have a tree with N vertices. Vertex 1 is the root of the tree, and the parent of Vertex i (2 \leq i \leq N) is Vertex P_i.
To each vertex in the tree, Snuke will allocate a color, either black or white, and a non-negative integer weight.
Snuke h... | instruction | 0 | 28,115 | 13 | 56,230 |
"Correct Solution:
```
# E
N = int(input())
P_list = list(map(int, input().split()))
X_list = list(map(int, input().split()))
# graph
child_list = [[] for _ in range(N+1)]
for i in range(2, N+1):
child_list[P_list[i-2]].append(i)
# from root
# minimize local total weight
color1 = [0]+X_list
color2 = [0]*(N+1)
#... | output | 1 | 28,115 | 13 | 56,231 |
Provide a correct Python 3 solution for this coding contest problem.
We have a tree with N vertices. Vertex 1 is the root of the tree, and the parent of Vertex i (2 \leq i \leq N) is Vertex P_i.
To each vertex in the tree, Snuke will allocate a color, either black or white, and a non-negative integer weight.
Snuke h... | instruction | 0 | 28,116 | 13 | 56,232 |
"Correct Solution:
```
from collections import defaultdict, deque, Counter
from heapq import heappush, heappop, heapify
import math
import bisect
import random
from itertools import permutations, accumulate, combinations, product
import sys
import string
from bisect import bisect_left, bisect_right
from math import fac... | output | 1 | 28,116 | 13 | 56,233 |
Provide a correct Python 3 solution for this coding contest problem.
We have a tree with N vertices. Vertex 1 is the root of the tree, and the parent of Vertex i (2 \leq i \leq N) is Vertex P_i.
To each vertex in the tree, Snuke will allocate a color, either black or white, and a non-negative integer weight.
Snuke h... | instruction | 0 | 28,117 | 13 | 56,234 |
"Correct Solution:
```
n = int(input())
p = [0,0] + list(map(int,input().split()))
x = [0] + list(map(int,input().split()))
child = [[] for _ in range(n+1)]
for i,pi in enumerate(p[2:],2):
child[pi].append(i)
tp = []
stack = [1]
while(stack):
i = stack.pop()
tp.append(i)
for ci in child[i]:
st... | output | 1 | 28,117 | 13 | 56,235 |
Provide a correct Python 3 solution for this coding contest problem.
We have a tree with N vertices. Vertex 1 is the root of the tree, and the parent of Vertex i (2 \leq i \leq N) is Vertex P_i.
To each vertex in the tree, Snuke will allocate a color, either black or white, and a non-negative integer weight.
Snuke h... | instruction | 0 | 28,118 | 13 | 56,236 |
"Correct Solution:
```
import sys
input = sys.stdin.readline
N = int(input())
graph = [[] for _ in range(N)]
P = list(map(int, input().split()))
Xs = list(map(int, input().split()))
for i, p in enumerate(P):
graph[p-1].append(i+1)
stack = [0]
Scores = [[0, 0] for _ in range(N)]
Ind = [0]*N
ok = True
while stack... | output | 1 | 28,118 | 13 | 56,237 |
Provide a correct Python 3 solution for this coding contest problem.
We have a tree with N vertices. Vertex 1 is the root of the tree, and the parent of Vertex i (2 \leq i \leq N) is Vertex P_i.
To each vertex in the tree, Snuke will allocate a color, either black or white, and a non-negative integer weight.
Snuke h... | instruction | 0 | 28,119 | 13 | 56,238 |
"Correct Solution:
```
# -*- coding: utf-8 -*-
import sys
from bisect import bisect_right
def input(): return sys.stdin.readline().strip()
def list2d(a, b, c): return [[c] * b for i in range(a)]
def list3d(a, b, c, d): return [[[d] * c for j in range(b)] for i in range(a)]
def list4d(a, b, c, d, e): return [[[[e] * d... | output | 1 | 28,119 | 13 | 56,239 |
Provide a correct Python 3 solution for this coding contest problem.
We have a tree with N vertices. Vertex 1 is the root of the tree, and the parent of Vertex i (2 \leq i \leq N) is Vertex P_i.
To each vertex in the tree, Snuke will allocate a color, either black or white, and a non-negative integer weight.
Snuke h... | instruction | 0 | 28,120 | 13 | 56,240 |
"Correct Solution:
```
n = int(input())
parents = list(map(int, input().split()))
weights = list(map(int, input().split()))
children = [[] for _ in range(n)]
for i in range(n-1):
children[parents[i]-1].append(i+1)
def dfs(cur):
if children[cur] == []:
return (weights[cur], 0)
sum = 0
dp = [[... | output | 1 | 28,120 | 13 | 56,241 |
Provide a correct Python 3 solution for this coding contest problem.
We have a tree with N vertices. Vertex 1 is the root of the tree, and the parent of Vertex i (2 \leq i \leq N) is Vertex P_i.
To each vertex in the tree, Snuke will allocate a color, either black or white, and a non-negative integer weight.
Snuke h... | instruction | 0 | 28,121 | 13 | 56,242 |
"Correct Solution:
```
# -*- coding: utf-8 -*-
import sys
from bisect import bisect_right
def input(): return sys.stdin.readline().strip()
def list2d(a, b, c): return [[c] * b for i in range(a)]
def list3d(a, b, c, d): return [[[d] * c for j in range(b)] for i in range(a)]
def list4d(a, b, c, d, e): return [[[[e] * d... | output | 1 | 28,121 | 13 | 56,243 |
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. Vertex 1 is the root of the tree, and the parent of Vertex i (2 \leq i \leq N) is Vertex P_i.
To each vertex in the tree, Snuke will allocate a color, either bla... | instruction | 0 | 28,122 | 13 | 56,244 |
Yes | output | 1 | 28,122 | 13 | 56,245 |
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. Vertex 1 is the root of the tree, and the parent of Vertex i (2 \leq i \leq N) is Vertex P_i.
To each vertex in the tree, Snuke will allocate a color, either bla... | instruction | 0 | 28,123 | 13 | 56,246 |
Yes | output | 1 | 28,123 | 13 | 56,247 |
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. Vertex 1 is the root of the tree, and the parent of Vertex i (2 \leq i \leq N) is Vertex P_i.
To each vertex in the tree, Snuke will allocate a color, either bla... | instruction | 0 | 28,124 | 13 | 56,248 |
Yes | output | 1 | 28,124 | 13 | 56,249 |
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. Vertex 1 is the root of the tree, and the parent of Vertex i (2 \leq i \leq N) is Vertex P_i.
To each vertex in the tree, Snuke will allocate a color, either bla... | instruction | 0 | 28,125 | 13 | 56,250 |
Yes | output | 1 | 28,125 | 13 | 56,251 |
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. Vertex 1 is the root of the tree, and the parent of Vertex i (2 \leq i \leq N) is Vertex P_i.
To each vertex in the tree, Snuke will allocate a color, either bla... | instruction | 0 | 28,126 | 13 | 56,252 |
No | output | 1 | 28,126 | 13 | 56,253 |
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. Vertex 1 is the root of the tree, and the parent of Vertex i (2 \leq i \leq N) is Vertex P_i.
To each vertex in the tree, Snuke will allocate a color, either bla... | instruction | 0 | 28,127 | 13 | 56,254 |
No | output | 1 | 28,127 | 13 | 56,255 |
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. Vertex 1 is the root of the tree, and the parent of Vertex i (2 \leq i \leq N) is Vertex P_i.
To each vertex in the tree, Snuke will allocate a color, either bla... | instruction | 0 | 28,128 | 13 | 56,256 |
No | output | 1 | 28,128 | 13 | 56,257 |
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. Vertex 1 is the root of the tree, and the parent of Vertex i (2 \leq i \leq N) is Vertex P_i.
To each vertex in the tree, Snuke will allocate a color, either bla... | instruction | 0 | 28,129 | 13 | 56,258 |
No | output | 1 | 28,129 | 13 | 56,259 |
Provide a correct Python 3 solution for this coding contest problem.
Problem
There are n vertices that are not connected to any of the vertices.
An undirected side is stretched between each vertex.
Find out how many sides can be stretched when the diameter is set to d.
The diameter represents the largest of the short... | instruction | 0 | 28,211 | 13 | 56,422 |
"Correct Solution:
```
# AOJ 1591 Graph Making
# Python3 2018.7.13 bal4u
n, d = map(int, input().split())
if d == 1: print(n*(n-1)//2)
else: print((n-1)+(n-d-1)*n-((n-d-1)*(n+d-2)//2))
``` | output | 1 | 28,211 | 13 | 56,423 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You've got a undirected tree s, consisting of n nodes. Your task is to build an optimal T-decomposition for it. Let's define a T-decomposition as follows.
Let's denote the set of all nodes s as v. Let's consider an undirected tree t, whose ... | instruction | 0 | 28,554 | 13 | 57,108 |
Tags: dfs and similar, graphs, greedy, trees
Correct Solution:
```
import sys
input = sys.stdin.readline
N = 10**5 + 5
g = [[] for _ in range(N)]
p = [0]*N
def bfs(cur):
q = [cur]
i = 0
while i < len(q):
cur = q[i]
i += 1
for nxt in g[cur]:
if(nxt != p[cur]):
p[nxt] = cur
q.append(nxt)
n = int(input... | output | 1 | 28,554 | 13 | 57,109 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You've got a undirected tree s, consisting of n nodes. Your task is to build an optimal T-decomposition for it. Let's define a T-decomposition as follows.
Let's denote the set of all nodes s as... | instruction | 0 | 28,555 | 13 | 57,110 |
No | output | 1 | 28,555 | 13 | 57,111 |
Provide a correct Python 3 solution for this coding contest problem.
Takahashi has received an undirected graph with N vertices, numbered 1, 2, ..., N. The edges in this graph are represented by (u_i, v_i). There are no self-loops and multiple edges in this graph.
Based on this graph, Takahashi is now constructing a ... | instruction | 0 | 28,956 | 13 | 57,912 |
"Correct Solution:
```
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
N, M = map(int, readline().split())
m = map(int, read().split())
G = [[] for _ in range(N + 1)]
for a, b in zip(m, m):
G[a].append(b)
G[b].append(a)
comp = [0] * (N + 1)
... | output | 1 | 28,956 | 13 | 57,913 |
Provide a correct Python 3 solution for this coding contest problem.
Takahashi has received an undirected graph with N vertices, numbered 1, 2, ..., N. The edges in this graph are represented by (u_i, v_i). There are no self-loops and multiple edges in this graph.
Based on this graph, Takahashi is now constructing a ... | instruction | 0 | 28,957 | 13 | 57,914 |
"Correct Solution:
```
import sys
readline = sys.stdin.readline
def check(s, Edge):
stack = [s]
col[s] = False
res = True
while stack:
vn = stack.pop()
for vf in Edge[vn]:
if vf in used:
if col[vn] == col[vf]:
res = False
else:... | output | 1 | 28,957 | 13 | 57,915 |
Provide a correct Python 3 solution for this coding contest problem.
Takahashi has received an undirected graph with N vertices, numbered 1, 2, ..., N. The edges in this graph are represented by (u_i, v_i). There are no self-loops and multiple edges in this graph.
Based on this graph, Takahashi is now constructing a ... | instruction | 0 | 28,958 | 13 | 57,916 |
"Correct Solution:
```
n,m=map(int,input().split())
vis,ci,cb,cc=[0]*(n+1),0,0,0
g=[[] for i in range(n+1)]
for i in range(m):
u,v=map(int,input().split())
g[u]+=[v]
g[v]+=[u]
for i in range(1,n+1):
if vis[i]==0:
if len(g[i])==0:
ci+=1
else:
s,f=[(i,1)],True
while len(s):
u,col=s.pop()
if vis... | output | 1 | 28,958 | 13 | 57,917 |
Provide a correct Python 3 solution for this coding contest problem.
Takahashi has received an undirected graph with N vertices, numbered 1, 2, ..., N. The edges in this graph are represented by (u_i, v_i). There are no self-loops and multiple edges in this graph.
Based on this graph, Takahashi is now constructing a ... | instruction | 0 | 28,959 | 13 | 57,918 |
"Correct Solution:
```
import sys
input=sys.stdin.readline
N,M=map(int,input().split())
edge=[[] for i in range(N)]
for i in range(M):
u,v=map(int,input().split())
edge[u-1].append(v-1)
edge[v-1].append(u-1)
def is_bipartgraph():
color=[0]*N
used=[False]*N
b=0
nb=0
for i in range(N):
... | output | 1 | 28,959 | 13 | 57,919 |
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