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Provide tags and a correct Python 3 solution for this coding contest problem. Boboniu has a directed graph with n vertices and m edges. The out-degree of each vertex is at most k. Each edge has an integer weight between 1 and m. No two edges have equal weights. Boboniu likes to walk on the graph with some specific ...
instruction
0
80,124
13
160,248
Tags: brute force, dfs and similar, graphs, hashing Correct Solution: ``` import sys input = lambda: sys.stdin.readline().rstrip() N, M, K = map(int, input().split()) OUT = [[] for _ in range(N)] t, m = 12345, (1 << 60) - 1 HASH = [] s = 987654321 H = 0 for _ in range(N): s = (s * 17 + t) & m HASH.append(s) ...
output
1
80,124
13
160,249
Provide tags and a correct Python 3 solution for this coding contest problem. Boboniu has a directed graph with n vertices and m edges. The out-degree of each vertex is at most k. Each edge has an integer weight between 1 and m. No two edges have equal weights. Boboniu likes to walk on the graph with some specific ...
instruction
0
80,125
13
160,250
Tags: brute force, dfs and similar, graphs, hashing Correct Solution: ``` import sys input = lambda: sys.stdin.readline().rstrip() N, M, K = map(int, input().split()) IN = [[] for _ in range(N)] OUT = [[] for _ in range(N)] t, m = 12345, (1 << 60) - 1 HASH = [] s = 987654321 H = 0 for _ in range(N): s = (s * 17 + t...
output
1
80,125
13
160,251
Provide tags and a correct Python 3 solution for this coding contest problem. Boboniu has a directed graph with n vertices and m edges. The out-degree of each vertex is at most k. Each edge has an integer weight between 1 and m. No two edges have equal weights. Boboniu likes to walk on the graph with some specific ...
instruction
0
80,126
13
160,252
Tags: brute force, dfs and similar, graphs, hashing Correct Solution: ``` import sys input = lambda: sys.stdin.readline().rstrip() N, M, K = map(int, input().split()) IN = [[] for _ in range(N)] OUT = [[] for _ in range(N)] t, m = 12345, (1 << 60) - 1 HASH = [] s = 987654321 H = 0 for _ in range(N): s = (s * 17 + t...
output
1
80,126
13
160,253
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Boboniu has a directed graph with n vertices and m edges. The out-degree of each vertex is at most k. Each edge has an integer weight between 1 and m. No two edges have equal weights. Boboniu...
instruction
0
80,127
13
160,254
Yes
output
1
80,127
13
160,255
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Boboniu has a directed graph with n vertices and m edges. The out-degree of each vertex is at most k. Each edge has an integer weight between 1 and m. No two edges have equal weights. Boboniu...
instruction
0
80,128
13
160,256
Yes
output
1
80,128
13
160,257
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Boboniu has a directed graph with n vertices and m edges. The out-degree of each vertex is at most k. Each edge has an integer weight between 1 and m. No two edges have equal weights. Boboniu...
instruction
0
80,129
13
160,258
Yes
output
1
80,129
13
160,259
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Boboniu has a directed graph with n vertices and m edges. The out-degree of each vertex is at most k. Each edge has an integer weight between 1 and m. No two edges have equal weights. Boboniu...
instruction
0
80,130
13
160,260
Yes
output
1
80,130
13
160,261
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Boboniu has a directed graph with n vertices and m edges. The out-degree of each vertex is at most k. Each edge has an integer weight between 1 and m. No two edges have equal weights. Boboniu...
instruction
0
80,131
13
160,262
No
output
1
80,131
13
160,263
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Boboniu has a directed graph with n vertices and m edges. The out-degree of each vertex is at most k. Each edge has an integer weight between 1 and m. No two edges have equal weights. Boboniu...
instruction
0
80,132
13
160,264
No
output
1
80,132
13
160,265
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Boboniu has a directed graph with n vertices and m edges. The out-degree of each vertex is at most k. Each edge has an integer weight between 1 and m. No two edges have equal weights. Boboniu...
instruction
0
80,133
13
160,266
No
output
1
80,133
13
160,267
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Boboniu has a directed graph with n vertices and m edges. The out-degree of each vertex is at most k. Each edge has an integer weight between 1 and m. No two edges have equal weights. Boboniu...
instruction
0
80,134
13
160,268
No
output
1
80,134
13
160,269
Provide tags and a correct Python 3 solution for this coding contest problem. Valera conducts experiments with algorithms that search for shortest paths. He has recently studied the Floyd's algorithm, so it's time to work with it. Valera's already written the code that counts the shortest distance between any pair of...
instruction
0
80,297
13
160,594
Tags: brute force, constructive algorithms, dfs and similar, graphs Correct Solution: ``` # written with help of editorial n, m, k = map(int, input().split()) ban = list(map(int, input().split())) if k == n or m > n * (n - 1) // 2 - k + 1: print('-1') else: edges = [(i, j) for i in range(1, n + 1) for j in ran...
output
1
80,297
13
160,595
Provide tags and a correct Python 3 solution for this coding contest problem. Valera conducts experiments with algorithms that search for shortest paths. He has recently studied the Floyd's algorithm, so it's time to work with it. Valera's already written the code that counts the shortest distance between any pair of...
instruction
0
80,298
13
160,596
Tags: brute force, constructive algorithms, dfs and similar, graphs Correct Solution: ``` import sys n, m, k = list(map(int, input().split())) if (m > n*(n-1)//2 - k + 1 or k == n): print(-1) sys.exit() kek = set() def add_edge(i, j): global m global kek if (m <= 0): return if ((i, j) in kek):...
output
1
80,298
13
160,597
Provide tags and a correct Python 3 solution for this coding contest problem. Valera conducts experiments with algorithms that search for shortest paths. He has recently studied the Floyd's algorithm, so it's time to work with it. Valera's already written the code that counts the shortest distance between any pair of...
instruction
0
80,299
13
160,598
Tags: brute force, constructive algorithms, dfs and similar, graphs Correct Solution: ``` #!/usr/bin/python3 def readln(): return tuple(map(int, input().split())) n, m, k = readln() a = sorted(readln()) if k == n: print(-1) else: b = [] for _ in range(1, n + 1): if _ not in a: b.append...
output
1
80,299
13
160,599
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Valera conducts experiments with algorithms that search for shortest paths. He has recently studied the Floyd's algorithm, so it's time to work with it. Valera's already written the code that c...
instruction
0
80,300
13
160,600
No
output
1
80,300
13
160,601
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Valera conducts experiments with algorithms that search for shortest paths. He has recently studied the Floyd's algorithm, so it's time to work with it. Valera's already written the code that c...
instruction
0
80,301
13
160,602
No
output
1
80,301
13
160,603
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Valera conducts experiments with algorithms that search for shortest paths. He has recently studied the Floyd's algorithm, so it's time to work with it. Valera's already written the code that c...
instruction
0
80,302
13
160,604
No
output
1
80,302
13
160,605
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Valera conducts experiments with algorithms that search for shortest paths. He has recently studied the Floyd's algorithm, so it's time to work with it. Valera's already written the code that c...
instruction
0
80,303
13
160,606
No
output
1
80,303
13
160,607
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. This is an interactive problem. The judge has a hidden rooted full binary tree with n leaves. A full binary tree is one where every node has either 0 or 2 children. The nodes with 0 children ar...
instruction
0
80,500
13
161,000
No
output
1
80,500
13
161,001
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. This is an interactive problem. The judge has a hidden rooted full binary tree with n leaves. A full binary tree is one where every node has either 0 or 2 children. The nodes with 0 children ar...
instruction
0
80,501
13
161,002
No
output
1
80,501
13
161,003
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. This is an interactive problem. The judge has a hidden rooted full binary tree with n leaves. A full binary tree is one where every node has either 0 or 2 children. The nodes with 0 children ar...
instruction
0
80,502
13
161,004
No
output
1
80,502
13
161,005
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. This is an interactive problem. The judge has a hidden rooted full binary tree with n leaves. A full binary tree is one where every node has either 0 or 2 children. The nodes with 0 children ar...
instruction
0
80,503
13
161,006
No
output
1
80,503
13
161,007
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You have a full binary tree having infinite levels. Each node has an initial value. If a node has value x, then its left child has value 2·x and its right child has value 2·x + 1. The value o...
instruction
0
80,582
13
161,164
No
output
1
80,582
13
161,165
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You have a full binary tree having infinite levels. Each node has an initial value. If a node has value x, then its left child has value 2·x and its right child has value 2·x + 1. The value o...
instruction
0
80,583
13
161,166
No
output
1
80,583
13
161,167
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You have a full binary tree having infinite levels. Each node has an initial value. If a node has value x, then its left child has value 2·x and its right child has value 2·x + 1. The value o...
instruction
0
80,584
13
161,168
No
output
1
80,584
13
161,169
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. You have a full binary tree having infinite levels. Each node has an initial value. If a node has value x, then its left child has value 2·x and its right child has value 2·x + 1. The value o...
instruction
0
80,585
13
161,170
No
output
1
80,585
13
161,171
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Ken loves ken-ken-pa (Japanese version of hopscotch). Today, he will play it on a directed graph G. G consists of N vertices numbered 1 to N, and M edges. The i-th edge points from Vertex u_i to...
instruction
0
80,646
13
161,292
Yes
output
1
80,646
13
161,293
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Ken loves ken-ken-pa (Japanese version of hopscotch). Today, he will play it on a directed graph G. G consists of N vertices numbered 1 to N, and M edges. The i-th edge points from Vertex u_i to...
instruction
0
80,647
13
161,294
Yes
output
1
80,647
13
161,295
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Ken loves ken-ken-pa (Japanese version of hopscotch). Today, he will play it on a directed graph G. G consists of N vertices numbered 1 to N, and M edges. The i-th edge points from Vertex u_i to...
instruction
0
80,648
13
161,296
Yes
output
1
80,648
13
161,297
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Ken loves ken-ken-pa (Japanese version of hopscotch). Today, he will play it on a directed graph G. G consists of N vertices numbered 1 to N, and M edges. The i-th edge points from Vertex u_i to...
instruction
0
80,649
13
161,298
Yes
output
1
80,649
13
161,299
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Ken loves ken-ken-pa (Japanese version of hopscotch). Today, he will play it on a directed graph G. G consists of N vertices numbered 1 to N, and M edges. The i-th edge points from Vertex u_i to...
instruction
0
80,650
13
161,300
No
output
1
80,650
13
161,301
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Ken loves ken-ken-pa (Japanese version of hopscotch). Today, he will play it on a directed graph G. G consists of N vertices numbered 1 to N, and M edges. The i-th edge points from Vertex u_i to...
instruction
0
80,651
13
161,302
No
output
1
80,651
13
161,303
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Ken loves ken-ken-pa (Japanese version of hopscotch). Today, he will play it on a directed graph G. G consists of N vertices numbered 1 to N, and M edges. The i-th edge points from Vertex u_i to...
instruction
0
80,652
13
161,304
No
output
1
80,652
13
161,305
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Ken loves ken-ken-pa (Japanese version of hopscotch). Today, he will play it on a directed graph G. G consists of N vertices numbered 1 to N, and M edges. The i-th edge points from Vertex u_i to...
instruction
0
80,653
13
161,306
No
output
1
80,653
13
161,307
Provide a correct Python 3 solution for this coding contest problem. H --Bit Operation Game Given a rooted tree with N vertices. The vertices are numbered from 0 to N − 1, and the 0th vertex represents the root. `T = 0` for the root, but for the other vertices * `T = T & X;` * `T = T & Y;` * `T = T | X` * `T = T | Y...
instruction
0
80,770
13
161,540
"Correct Solution: ``` from collections import deque from itertools import permutations import sys readline = sys.stdin.readline write = sys.stdout.write def solve(): N, M = map(int, readline().split()) OP = [0]*N ops = ["T=T&X\n", "T=T&Y\n", "T=T|X\n", "T=T|Y\n", "T=T^X\n", "T=T^Y\n"] for i in range(N-...
output
1
80,770
13
161,541
Provide a correct Python 3 solution for this coding contest problem. Depth-first search (DFS) follows the strategy to search ”deeper” in the graph whenever possible. In DFS, edges are recursively explored out of the most recently discovered vertex $v$ that still has unexplored edges leaving it. When all of $v$'s edges...
instruction
0
80,781
13
161,562
"Correct Solution: ``` from sys import stdin readline=stdin.readline #入力 n=int(readline()) m=n+1 u,k,v=[0]*m,[0]*m,[0]*m for i in range(1,m): u[i],k[i],*v[i]=map(int,readline().split()) d=[0]*m f=[0]*m flags=[False]*m t=0 def dfs(now): global t t+=1 d[now]=t flags[now]=True for nex in v[now]: ...
output
1
80,781
13
161,563
Provide a correct Python 3 solution for this coding contest problem. Depth-first search (DFS) follows the strategy to search ”deeper” in the graph whenever possible. In DFS, edges are recursively explored out of the most recently discovered vertex $v$ that still has unexplored edges leaving it. When all of $v$'s edges...
instruction
0
80,782
13
161,564
"Correct Solution: ``` n=int(input()) D=[0]*(n+1) F=[0]*(n+1) v=[[] for i in range(n+1)] flg=True t=1 for i in range(n): a=list(map(int,input().split())) v[a[0]]=sorted(a[2:]) def dfs(p): global t if D[p]!=0: return D[p]=t t+=1 for i in v[p]: if D[i]==0: dfs(i) F[p]=t t+=1 while flg: flg=False...
output
1
80,782
13
161,565
Provide a correct Python 3 solution for this coding contest problem. Depth-first search (DFS) follows the strategy to search ”deeper” in the graph whenever possible. In DFS, edges are recursively explored out of the most recently discovered vertex $v$ that still has unexplored edges leaving it. When all of $v$'s edges...
instruction
0
80,783
13
161,566
"Correct Solution: ``` n = int(input()) vert = [[0,0]+list(map(int,range(1,n+1)))] parents = [0] now = 0 time = 0 for i in range(n): ukv = list(map(int,input().split())) vert.append([0,0]+ukv[2:]) while(parents): for i in range(2,len(vert[now])): if vert[vert[now][i]][0] == 0: parents.ap...
output
1
80,783
13
161,567
Provide a correct Python 3 solution for this coding contest problem. Depth-first search (DFS) follows the strategy to search ”deeper” in the graph whenever possible. In DFS, edges are recursively explored out of the most recently discovered vertex $v$ that still has unexplored edges leaving it. When all of $v$'s edges...
instruction
0
80,784
13
161,568
"Correct Solution: ``` N = int(input()) adj_list = [] for _ in range(N): line = list(input().split(" ")) adj_list.append([int(k) - 1 for k in line[2:]]) d = [-1 for _ in range(N)] f = [-1 for _ in range(N)] time = 1 visited = set() def dfs(p): global time if p in visited: return d[p] = t...
output
1
80,784
13
161,569
Provide a correct Python 3 solution for this coding contest problem. Depth-first search (DFS) follows the strategy to search ”deeper” in the graph whenever possible. In DFS, edges are recursively explored out of the most recently discovered vertex $v$ that still has unexplored edges leaving it. When all of $v$'s edges...
instruction
0
80,785
13
161,570
"Correct Solution: ``` import sys time = 0 def dfs(u): global time flag_list[u] = 1 time += 1 d_list[u] = time for v in range(n): if m_list[u][v] == 1 and flag_list[v] == 0: dfs(v) flag_list[u] = 2 time += 1 f_list[u] = time input = sys.stdin.readline n = int(input...
output
1
80,785
13
161,571
Provide a correct Python 3 solution for this coding contest problem. Depth-first search (DFS) follows the strategy to search ”deeper” in the graph whenever possible. In DFS, edges are recursively explored out of the most recently discovered vertex $v$ that still has unexplored edges leaving it. When all of $v$'s edges...
instruction
0
80,786
13
161,572
"Correct Solution: ``` n=int(input()) E=[0]*n for _ in range(n): u,k,*V=map(int,input().split()) E[u-1]=sorted(V)[::-1] todo=[1] seen=[0]*n d=[0]*n f=[0]*n t=0 while 0 in f: if not todo: todo.append(seen.index(0)+1) if seen[todo[-1]-1]==0: seen[todo[-1]-1]=1 t+=1 d[to...
output
1
80,786
13
161,573
Provide a correct Python 3 solution for this coding contest problem. Depth-first search (DFS) follows the strategy to search ”deeper” in the graph whenever possible. In DFS, edges are recursively explored out of the most recently discovered vertex $v$ that still has unexplored edges leaving it. When all of $v$'s edges...
instruction
0
80,787
13
161,574
"Correct Solution: ``` import sys sys.setrecursionlimit(3000) n = int(input()) X = [] for _ in range(n): x = list(map(int, input().split())) if x[1] != 0: X.append(x[2:]) else: X.append([]) df = [[0, 0] for _ in range(n)] t = 0 def search(i = 0): global t if df[i][0] == 0: ...
output
1
80,787
13
161,575
Provide a correct Python 3 solution for this coding contest problem. Depth-first search (DFS) follows the strategy to search ”deeper” in the graph whenever possible. In DFS, edges are recursively explored out of the most recently discovered vertex $v$ that still has unexplored edges leaving it. When all of $v$'s edges...
instruction
0
80,788
13
161,576
"Correct Solution: ``` n = int(input()) al = [list(map(lambda s: int(s) - 1, input().split()))[2:] for _ in range(n)] begin = [-1] * n end = [-1] * n not_visited = list(range(n)) t = 1 def dfs(u): global begin, end, t, not_visited begin[u] = t t += 1 not_visited.remove(u) for v in al[u]: if ...
output
1
80,788
13
161,577
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Depth-first search (DFS) follows the strategy to search ”deeper” in the graph whenever possible. In DFS, edges are recursively explored out of the most recently discovered vertex $v$ that still ...
instruction
0
80,789
13
161,578
Yes
output
1
80,789
13
161,579
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Depth-first search (DFS) follows the strategy to search ”deeper” in the graph whenever possible. In DFS, edges are recursively explored out of the most recently discovered vertex $v$ that still ...
instruction
0
80,790
13
161,580
Yes
output
1
80,790
13
161,581
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Depth-first search (DFS) follows the strategy to search ”deeper” in the graph whenever possible. In DFS, edges are recursively explored out of the most recently discovered vertex $v$ that still ...
instruction
0
80,791
13
161,582
Yes
output
1
80,791
13
161,583
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Depth-first search (DFS) follows the strategy to search ”deeper” in the graph whenever possible. In DFS, edges are recursively explored out of the most recently discovered vertex $v$ that still ...
instruction
0
80,792
13
161,584
Yes
output
1
80,792
13
161,585
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Depth-first search (DFS) follows the strategy to search ”deeper” in the graph whenever possible. In DFS, edges are recursively explored out of the most recently discovered vertex $v$ that still ...
instruction
0
80,793
13
161,586
No
output
1
80,793
13
161,587
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Depth-first search (DFS) follows the strategy to search ”deeper” in the graph whenever possible. In DFS, edges are recursively explored out of the most recently discovered vertex $v$ that still ...
instruction
0
80,794
13
161,588
No
output
1
80,794
13
161,589
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Depth-first search (DFS) follows the strategy to search ”deeper” in the graph whenever possible. In DFS, edges are recursively explored out of the most recently discovered vertex $v$ that still ...
instruction
0
80,795
13
161,590
No
output
1
80,795
13
161,591