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Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. DZY loves Physics, and he enjoys calculating density. Almost everything has density, even a graph. We define the density of a non-directed graph (nodes and edges of the graph have some values) ...
instruction
0
44,940
13
89,880
Yes
output
1
44,940
13
89,881
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. DZY loves Physics, and he enjoys calculating density. Almost everything has density, even a graph. We define the density of a non-directed graph (nodes and edges of the graph have some values) ...
instruction
0
44,941
13
89,882
Yes
output
1
44,941
13
89,883
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. DZY loves Physics, and he enjoys calculating density. Almost everything has density, even a graph. We define the density of a non-directed graph (nodes and edges of the graph have some values) ...
instruction
0
44,942
13
89,884
Yes
output
1
44,942
13
89,885
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Ilya is very fond of graphs, especially trees. During his last trip to the forest Ilya found a very interesting tree rooted at vertex 1. There is an integer number written on each vertex of the ...
instruction
0
45,095
13
90,190
No
output
1
45,095
13
90,191
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Ilya is very fond of graphs, especially trees. During his last trip to the forest Ilya found a very interesting tree rooted at vertex 1. There is an integer number written on each vertex of the ...
instruction
0
45,096
13
90,192
No
output
1
45,096
13
90,193
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Ilya is very fond of graphs, especially trees. During his last trip to the forest Ilya found a very interesting tree rooted at vertex 1. There is an integer number written on each vertex of the ...
instruction
0
45,097
13
90,194
No
output
1
45,097
13
90,195
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Ilya is very fond of graphs, especially trees. During his last trip to the forest Ilya found a very interesting tree rooted at vertex 1. There is an integer number written on each vertex of the ...
instruction
0
45,098
13
90,196
No
output
1
45,098
13
90,197
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given a complete undirected graph with n vertices. A number ai is assigned to each vertex, and the weight of an edge between vertices i and j is equal to ai xor aj. Calculate the weight...
instruction
0
45,115
13
90,230
No
output
1
45,115
13
90,231
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given a complete undirected graph with n vertices. A number ai is assigned to each vertex, and the weight of an edge between vertices i and j is equal to ai xor aj. Calculate the weight...
instruction
0
45,116
13
90,232
No
output
1
45,116
13
90,233
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given a complete undirected graph with n vertices. A number ai is assigned to each vertex, and the weight of an edge between vertices i and j is equal to ai xor aj. Calculate the weight...
instruction
0
45,117
13
90,234
No
output
1
45,117
13
90,235
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given a complete undirected graph with n vertices. A number ai is assigned to each vertex, and the weight of an edge between vertices i and j is equal to ai xor aj. Calculate the weight...
instruction
0
45,118
13
90,236
No
output
1
45,118
13
90,237
Provide a correct Python 3 solution for this coding contest problem. Given is a tree G with N vertices. The vertices are numbered 1 through N, and the i-th edge connects Vertex a_i and Vertex b_i. Consider painting the edges in G with some number of colors. We want to paint them so that, for each vertex, the colors o...
instruction
0
45,191
13
90,382
"Correct Solution: ``` def p_d(): n = int(input()) t = [[] for _ in range(n)] p = [-1] * n for i in range(n - 1): a, b = map(int, input().split()) t[a - 1].append((i, b - 1)) p[b - 1] = a - 1 q = [(0, -1)] ans = [-1] * (n - 1) while q: x, c0 = q.pop() ...
output
1
45,191
13
90,383
Provide a correct Python 3 solution for this coding contest problem. Given is a tree G with N vertices. The vertices are numbered 1 through N, and the i-th edge connects Vertex a_i and Vertex b_i. Consider painting the edges in G with some number of colors. We want to paint them so that, for each vertex, the colors o...
instruction
0
45,192
13
90,384
"Correct Solution: ``` from collections import deque def main(): N, *AB = map(int, open(0).read().split()) A, B = AB[::2], AB[1::2] E = [[] for _ in range(N + 1)] for a, b in zip(A, B): E[a].append(b) Q = deque([1]) C = [0] * (N + 1) while Q: v = Q.popleft() c = 0 ...
output
1
45,192
13
90,385
Provide a correct Python 3 solution for this coding contest problem. Given is a tree G with N vertices. The vertices are numbered 1 through N, and the i-th edge connects Vertex a_i and Vertex b_i. Consider painting the edges in G with some number of colors. We want to paint them so that, for each vertex, the colors o...
instruction
0
45,193
13
90,386
"Correct Solution: ``` # -*- coding: utf-8 -*- n = int(input()) ab = [list(map(int,input().split())) for i in range(n-1)] ans = [0] * (n-1) abi = [[] for _ in range(n+1)] #再起のlimitを上げる import sys sys.setrecursionlimit(4100000) for i,(a,b) in enumerate(ab): abi[a].append((i,b)) abi[b].append((i,a)) def dfs(v,pa...
output
1
45,193
13
90,387
Provide a correct Python 3 solution for this coding contest problem. Given is a tree G with N vertices. The vertices are numbered 1 through N, and the i-th edge connects Vertex a_i and Vertex b_i. Consider painting the edges in G with some number of colors. We want to paint them so that, for each vertex, the colors o...
instruction
0
45,194
13
90,388
"Correct Solution: ``` n = int(input()) g = [[] for i in range(n)] for i in range(n-1): a,b = map(int,input().split()) g[a-1].append([b-1,i]) g[b-1].append([a-1,i]) from collections import deque d = deque([(0,-1)]) ans = [0 for i in range(n-1)] while d: a,noc = d.popleft() c = 1 if noc != 1 else 2 ...
output
1
45,194
13
90,389
Provide a correct Python 3 solution for this coding contest problem. Given is a tree G with N vertices. The vertices are numbered 1 through N, and the i-th edge connects Vertex a_i and Vertex b_i. Consider painting the edges in G with some number of colors. We want to paint them so that, for each vertex, the colors o...
instruction
0
45,195
13
90,390
"Correct Solution: ``` import sys input = sys.stdin.readline n = int(input()) l=[[]] nn = [] for _ in range(n+1): l.append([]) for i in range(n-1): a,b = map(int,input().split()) l[a].append(b) l[b].append(a) nn.append(b) ml = list(map(len,l)) m = max(ml) co = [] for i in range(n+1): co.appe...
output
1
45,195
13
90,391
Provide a correct Python 3 solution for this coding contest problem. Given is a tree G with N vertices. The vertices are numbered 1 through N, and the i-th edge connects Vertex a_i and Vertex b_i. Consider painting the edges in G with some number of colors. We want to paint them so that, for each vertex, the colors o...
instruction
0
45,196
13
90,392
"Correct Solution: ``` import sys sys.setrecursionlimit(500000) N = int(input()) E = [[] for _ in range(N+1)] for i in range(N-1): a,b = map(int,input().split()) E[a].append((b,i)) E[b].append((a,i)) #最大の次数を見つける K = max(len(e) for e in E) print(K) ans = [-1] * (N-1) def dfs(v=1,p=0,p_col=-1): col = 1 ...
output
1
45,196
13
90,393
Provide a correct Python 3 solution for this coding contest problem. Given is a tree G with N vertices. The vertices are numbered 1 through N, and the i-th edge connects Vertex a_i and Vertex b_i. Consider painting the edges in G with some number of colors. We want to paint them so that, for each vertex, the colors o...
instruction
0
45,197
13
90,394
"Correct Solution: ``` import sys sys.setrecursionlimit(10**8) n=int(input()) AB=[list(map(int,input().split())) for _ in range(n-1)] path=[[] for _ in range(n)] for i,(a,b) in enumerate(AB): a,b=a-1,b-1 path[a].append((b,i)) path[b].append((a,i)) visited=[0]*n ans=[None]*(n-1) def dfs(v,c=-1): nc=1 fo...
output
1
45,197
13
90,395
Provide a correct Python 3 solution for this coding contest problem. Given is a tree G with N vertices. The vertices are numbered 1 through N, and the i-th edge connects Vertex a_i and Vertex b_i. Consider painting the edges in G with some number of colors. We want to paint them so that, for each vertex, the colors o...
instruction
0
45,198
13
90,396
"Correct Solution: ``` # 2019/11/24 import sys sys.setrecursionlimit(10**9) n=int(input()) ab=[] edge=[[] for _ in range(n)] for i in range(n-1): a,b=map(int,input().split()) a,b=a-1,b-1 ab.append((a,b)) edge[a].append(b) ans={} def solve(p,c): global ans cnt=1 for vtx in edge[p]: ...
output
1
45,198
13
90,397
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Given is a tree G with N vertices. The vertices are numbered 1 through N, and the i-th edge connects Vertex a_i and Vertex b_i. Consider painting the edges in G with some number of colors. We w...
instruction
0
45,199
13
90,398
Yes
output
1
45,199
13
90,399
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Given is a tree G with N vertices. The vertices are numbered 1 through N, and the i-th edge connects Vertex a_i and Vertex b_i. Consider painting the edges in G with some number of colors. We w...
instruction
0
45,200
13
90,400
Yes
output
1
45,200
13
90,401
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Given is a tree G with N vertices. The vertices are numbered 1 through N, and the i-th edge connects Vertex a_i and Vertex b_i. Consider painting the edges in G with some number of colors. We w...
instruction
0
45,201
13
90,402
Yes
output
1
45,201
13
90,403
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Given is a tree G with N vertices. The vertices are numbered 1 through N, and the i-th edge connects Vertex a_i and Vertex b_i. Consider painting the edges in G with some number of colors. We w...
instruction
0
45,202
13
90,404
Yes
output
1
45,202
13
90,405
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Given is a tree G with N vertices. The vertices are numbered 1 through N, and the i-th edge connects Vertex a_i and Vertex b_i. Consider painting the edges in G with some number of colors. We w...
instruction
0
45,203
13
90,406
No
output
1
45,203
13
90,407
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Given is a tree G with N vertices. The vertices are numbered 1 through N, and the i-th edge connects Vertex a_i and Vertex b_i. Consider painting the edges in G with some number of colors. We w...
instruction
0
45,204
13
90,408
No
output
1
45,204
13
90,409
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Given is a tree G with N vertices. The vertices are numbered 1 through N, and the i-th edge connects Vertex a_i and Vertex b_i. Consider painting the edges in G with some number of colors. We w...
instruction
0
45,205
13
90,410
No
output
1
45,205
13
90,411
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Given is a tree G with N vertices. The vertices are numbered 1 through N, and the i-th edge connects Vertex a_i and Vertex b_i. Consider painting the edges in G with some number of colors. We w...
instruction
0
45,206
13
90,412
No
output
1
45,206
13
90,413
Provide tags and a correct Python 3 solution for this coding contest problem. Dima the hamster enjoys nibbling different things: cages, sticks, bad problemsetters and even trees! Recently he found a binary search tree and instinctively nibbled all of its edges, hence messing up the vertices. Dima knows that if Andrew...
instruction
0
45,394
13
90,788
Tags: brute force, dp, math, number theory, trees Correct Solution: ``` from math import gcd import random,time,sys input=sys.stdin.buffer.readline def main(): n=int(input()) a=list(map(int,input().split())) #a=[2*random.randint(1,10**9) for i in range(n)] start=time.time() a+=[0] GCD=[0 for ...
output
1
45,394
13
90,789
Provide tags and a correct Python 3 solution for this coding contest problem. Dima the hamster enjoys nibbling different things: cages, sticks, bad problemsetters and even trees! Recently he found a binary search tree and instinctively nibbled all of its edges, hence messing up the vertices. Dima knows that if Andrew...
instruction
0
45,395
13
90,790
Tags: brute force, dp, math, number theory, trees Correct Solution: ``` from sys import stdin from math import gcd n=int(stdin.readline()) a=[int(x) for x in stdin.readline().split()] c = [] ld=[] rd=[] def check(l, r, e): if r == l: return c[l][e] > 0 if e < l and ld[l][r-l] != 0: return ld[l][r-l] =...
output
1
45,395
13
90,791
Provide tags and a correct Python 3 solution for this coding contest problem. Dima the hamster enjoys nibbling different things: cages, sticks, bad problemsetters and even trees! Recently he found a binary search tree and instinctively nibbled all of its edges, hence messing up the vertices. Dima knows that if Andrew...
instruction
0
45,396
13
90,792
Tags: brute force, dp, math, number theory, trees Correct Solution: ``` from math import gcd import random,time,sys input=sys.stdin.buffer.readline def main(): n=int(input()) a=list(map(int,input().split())) #a=[2*random.randint(1,10**9) for i in range(n)] start=time.time() a+=[0] dp=[[False ...
output
1
45,396
13
90,793
Provide tags and a correct Python 3 solution for this coding contest problem. Dima the hamster enjoys nibbling different things: cages, sticks, bad problemsetters and even trees! Recently he found a binary search tree and instinctively nibbled all of its edges, hence messing up the vertices. Dima knows that if Andrew...
instruction
0
45,397
13
90,794
Tags: brute force, dp, math, number theory, trees Correct Solution: ``` from math import gcd import random,time,sys input=sys.stdin.buffer.readline def main(): n=int(input()) a=list(map(int,input().split())) #a=[2*random.randint(1,10**9) for i in range(n)] start=time.time() GCD=[1<<i for i in ran...
output
1
45,397
13
90,795
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Dima the hamster enjoys nibbling different things: cages, sticks, bad problemsetters and even trees! Recently he found a binary search tree and instinctively nibbled all of its edges, hence mes...
instruction
0
45,398
13
90,796
No
output
1
45,398
13
90,797
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Dima the hamster enjoys nibbling different things: cages, sticks, bad problemsetters and even trees! Recently he found a binary search tree and instinctively nibbled all of its edges, hence mes...
instruction
0
45,399
13
90,798
No
output
1
45,399
13
90,799
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Dima the hamster enjoys nibbling different things: cages, sticks, bad problemsetters and even trees! Recently he found a binary search tree and instinctively nibbled all of its edges, hence mes...
instruction
0
45,400
13
90,800
No
output
1
45,400
13
90,801
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Dima the hamster enjoys nibbling different things: cages, sticks, bad problemsetters and even trees! Recently he found a binary search tree and instinctively nibbled all of its edges, hence mes...
instruction
0
45,401
13
90,802
No
output
1
45,401
13
90,803
Provide tags and a correct Python 3 solution for this coding contest problem. You are given a graph with 3 ⋅ n vertices and m edges. You are to find a matching of n edges, or an independent set of n vertices. A set of edges is called a matching if no two edges share an endpoint. A set of vertices is called an indepe...
instruction
0
45,464
13
90,928
Tags: constructive algorithms, graphs, greedy, sortings Correct Solution: ``` def naiveSolve(n): return def main(): # Try to make the matching by taking as many random edges as possible. # Any vertex that is excluded will either be connected to nothing or to # a vertex in the mat...
output
1
45,464
13
90,929
Provide tags and a correct Python 3 solution for this coding contest problem. You are given a graph with 3 ⋅ n vertices and m edges. You are to find a matching of n edges, or an independent set of n vertices. A set of edges is called a matching if no two edges share an endpoint. A set of vertices is called an indepe...
instruction
0
45,465
13
90,930
Tags: constructive algorithms, graphs, greedy, sortings Correct Solution: ``` import sys import io, os input = io.BytesIO(os.read(0,os.fstat(0).st_size)).readline t = int(input()) for _ in range(t): n, m = map(int, input().split()) edge = [] for i in range(m): u, v = map(int, input().split()) ...
output
1
45,465
13
90,931
Provide tags and a correct Python 3 solution for this coding contest problem. You are given a graph with 3 ⋅ n vertices and m edges. You are to find a matching of n edges, or an independent set of n vertices. A set of edges is called a matching if no two edges share an endpoint. A set of vertices is called an indepe...
instruction
0
45,466
13
90,932
Tags: constructive algorithms, graphs, greedy, sortings Correct Solution: ``` from sys import stdin input = stdin.readline T = int(input()) for _ in range(T): n, m = [int(i) for i in input().split()] ind_edg_v = [True]*(3*n+1) ind_edg_e = [0]*n num_edg = 0 for j in range(m): ed...
output
1
45,466
13
90,933
Provide tags and a correct Python 3 solution for this coding contest problem. You are given a graph with 3 ⋅ n vertices and m edges. You are to find a matching of n edges, or an independent set of n vertices. A set of edges is called a matching if no two edges share an endpoint. A set of vertices is called an indepe...
instruction
0
45,467
13
90,934
Tags: constructive algorithms, graphs, greedy, sortings Correct Solution: ``` from sys import stdin input = stdin.readline def solve_graph(): n,m = map(int, input().split()) included = [False] + ([True]*(3*n)) matching =[] for i in range(1,m+1): e1, e2 = map(int, input().split()) if in...
output
1
45,467
13
90,935
Provide tags and a correct Python 3 solution for this coding contest problem. You are given a graph with 3 ⋅ n vertices and m edges. You are to find a matching of n edges, or an independent set of n vertices. A set of edges is called a matching if no two edges share an endpoint. A set of vertices is called an indepe...
instruction
0
45,468
13
90,936
Tags: constructive algorithms, graphs, greedy, sortings Correct Solution: ``` from sys import stdin input = stdin.readline myint = int def solve_graph(): n,m = map(myint, input().split()) included = [False] + ([True]*(3*n)) matching =[] for i in range(1,m+1): e1, e2 = map(myint, input().split...
output
1
45,468
13
90,937
Provide tags and a correct Python 3 solution for this coding contest problem. You are given a graph with 3 ⋅ n vertices and m edges. You are to find a matching of n edges, or an independent set of n vertices. A set of edges is called a matching if no two edges share an endpoint. A set of vertices is called an indepe...
instruction
0
45,469
13
90,938
Tags: constructive algorithms, graphs, greedy, sortings Correct Solution: ``` import sys input = sys.stdin.readline T = int(input()) for _ in range(T): n, m = map(int, input().split()) v = set(range(1, 3 * n + 1)) e = [] for i in range(1, m + 1): a, b = map(int, input().split()) if a in ...
output
1
45,469
13
90,939
Provide tags and a correct Python 3 solution for this coding contest problem. You are given a graph with 3 ⋅ n vertices and m edges. You are to find a matching of n edges, or an independent set of n vertices. A set of edges is called a matching if no two edges share an endpoint. A set of vertices is called an indepe...
instruction
0
45,470
13
90,940
Tags: constructive algorithms, graphs, greedy, sortings Correct Solution: ``` import sys input = sys.stdin.readline T=int(input()) for testcases in range(T): n,m=map(int,input().split()) EDGE=[[0,0]]+[list(map(int,input().split())) for i in range(m)] USED=[0]*(3*n+1) count=0 ANS=[] for i in ...
output
1
45,470
13
90,941
Provide tags and a correct Python 3 solution for this coding contest problem. You are given a graph with 3 ⋅ n vertices and m edges. You are to find a matching of n edges, or an independent set of n vertices. A set of edges is called a matching if no two edges share an endpoint. A set of vertices is called an indepe...
instruction
0
45,471
13
90,942
Tags: constructive algorithms, graphs, greedy, sortings Correct Solution: ``` ''' cho n và m: có 3*n đỉnh và m mối quan hệ giữa các đỉnh kết hợp: tập hợp các cạnh không có chung điểm cuối độc lập: tập hợp các điểm mà không có bất kì điểm nào nằm trong chung trong một cạnh output: in ra nếu có tập có độ lớn n thỏa kết ...
output
1
45,471
13
90,943
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given a graph with 3 ⋅ n vertices and m edges. You are to find a matching of n edges, or an independent set of n vertices. A set of edges is called a matching if no two edges share an e...
instruction
0
45,472
13
90,944
Yes
output
1
45,472
13
90,945
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given a graph with 3 ⋅ n vertices and m edges. You are to find a matching of n edges, or an independent set of n vertices. A set of edges is called a matching if no two edges share an e...
instruction
0
45,473
13
90,946
Yes
output
1
45,473
13
90,947
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given a graph with 3 ⋅ n vertices and m edges. You are to find a matching of n edges, or an independent set of n vertices. A set of edges is called a matching if no two edges share an e...
instruction
0
45,474
13
90,948
Yes
output
1
45,474
13
90,949
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given a graph with 3 ⋅ n vertices and m edges. You are to find a matching of n edges, or an independent set of n vertices. A set of edges is called a matching if no two edges share an e...
instruction
0
45,475
13
90,950
Yes
output
1
45,475
13
90,951
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given a graph with 3 ⋅ n vertices and m edges. You are to find a matching of n edges, or an independent set of n vertices. A set of edges is called a matching if no two edges share an e...
instruction
0
45,476
13
90,952
No
output
1
45,476
13
90,953
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given a graph with 3 ⋅ n vertices and m edges. You are to find a matching of n edges, or an independent set of n vertices. A set of edges is called a matching if no two edges share an e...
instruction
0
45,477
13
90,954
No
output
1
45,477
13
90,955
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You are given a graph with 3 ⋅ n vertices and m edges. You are to find a matching of n edges, or an independent set of n vertices. A set of edges is called a matching if no two edges share an e...
instruction
0
45,478
13
90,956
No
output
1
45,478
13
90,957