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Provide tags and a correct Python 3 solution for this coding contest problem. Musicians of a popular band "Flayer" have announced that they are going to "make their exit" with a world tour. Of course, they will visit Berland as well. There are n cities in Berland. People can travel between cities using two-directiona...
instruction
0
29,713
1
59,426
Tags: data structures, graphs, shortest paths Correct Solution: ``` from __future__ import division, print_function py2 = round(0.5) # Should take 900 ms something if py2: from future_builtins import ascii, filter, hex, map, oct, zip range = xrange import os, sys from io import BytesIO, IOBase # FastIO for ...
output
1
29,713
1
59,427
Provide tags and a correct Python 3 solution for this coding contest problem. Musicians of a popular band "Flayer" have announced that they are going to "make their exit" with a world tour. Of course, they will visit Berland as well. There are n cities in Berland. People can travel between cities using two-directiona...
instruction
0
29,714
1
59,428
Tags: data structures, graphs, shortest paths Correct Solution: ``` from __future__ import division, print_function py2 = round(0.5) # OLD VERSION if py2: from future_builtins import ascii, filter, hex, map, oct, zip range = xrange import os, sys from io import BytesIO, IOBase # FastIO for PyPy2 and PyPy3 b...
output
1
29,714
1
59,429
Provide tags and a correct Python 3 solution for this coding contest problem. Musicians of a popular band "Flayer" have announced that they are going to "make their exit" with a world tour. Of course, they will visit Berland as well. There are n cities in Berland. People can travel between cities using two-directiona...
instruction
0
29,715
1
59,430
Tags: data structures, graphs, shortest paths Correct Solution: ``` #!/usr/bin/env python3 import os import sys from io import BytesIO class FastI: def __init__(self): self.stream = BytesIO() self.newlines = 0 def read(self, b=b'\n'): while b: b, ptr = os.read(0, (1 << 13)...
output
1
29,715
1
59,431
Provide tags and a correct Python 3 solution for this coding contest problem. Musicians of a popular band "Flayer" have announced that they are going to "make their exit" with a world tour. Of course, they will visit Berland as well. There are n cities in Berland. People can travel between cities using two-directiona...
instruction
0
29,716
1
59,432
Tags: data structures, graphs, shortest paths Correct Solution: ``` from __future__ import division, print_function import os import sys from io import BytesIO, IOBase py2 = round(0.5) if py2: from future_builtins import ascii, filter, hex, map, oct, zip range = xrange class FastI(): stream = BytesIO()...
output
1
29,716
1
59,433
Provide tags and a correct Python 3 solution for this coding contest problem. Musicians of a popular band "Flayer" have announced that they are going to "make their exit" with a world tour. Of course, they will visit Berland as well. There are n cities in Berland. People can travel between cities using two-directiona...
instruction
0
29,717
1
59,434
Tags: data structures, graphs, shortest paths Correct Solution: ``` from __future__ import division, print_function py2 = round(0.5) # Testing small buffer size in readnumbers if py2: from future_builtins import ascii, filter, hex, map, oct, zip range = xrange import os, sys from io import BytesIO, IOBase #...
output
1
29,717
1
59,435
Provide tags and a correct Python 3 solution for this coding contest problem. Musicians of a popular band "Flayer" have announced that they are going to "make their exit" with a world tour. Of course, they will visit Berland as well. There are n cities in Berland. People can travel between cities using two-directiona...
instruction
0
29,718
1
59,436
Tags: data structures, graphs, shortest paths Correct Solution: ``` from __future__ import division, print_function py2 = round(0.5) # Should take 900 ms something, if py2: from future_builtins import ascii, filter, hex, map, oct, zip range = xrange import os, sys from io import BytesIO, IOBase # FastIO for...
output
1
29,718
1
59,437
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Musicians of a popular band "Flayer" have announced that they are going to "make their exit" with a world tour. Of course, they will visit Berland as well. There are n cities in Berland. People...
instruction
0
29,719
1
59,438
Yes
output
1
29,719
1
59,439
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Musicians of a popular band "Flayer" have announced that they are going to "make their exit" with a world tour. Of course, they will visit Berland as well. There are n cities in Berland. People...
instruction
0
29,720
1
59,440
Yes
output
1
29,720
1
59,441
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Musicians of a popular band "Flayer" have announced that they are going to "make their exit" with a world tour. Of course, they will visit Berland as well. There are n cities in Berland. People...
instruction
0
29,721
1
59,442
Yes
output
1
29,721
1
59,443
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Musicians of a popular band "Flayer" have announced that they are going to "make their exit" with a world tour. Of course, they will visit Berland as well. There are n cities in Berland. People...
instruction
0
29,722
1
59,444
Yes
output
1
29,722
1
59,445
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Musicians of a popular band "Flayer" have announced that they are going to "make their exit" with a world tour. Of course, they will visit Berland as well. There are n cities in Berland. People...
instruction
0
29,723
1
59,446
No
output
1
29,723
1
59,447
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Musicians of a popular band "Flayer" have announced that they are going to "make their exit" with a world tour. Of course, they will visit Berland as well. There are n cities in Berland. People...
instruction
0
29,724
1
59,448
No
output
1
29,724
1
59,449
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Musicians of a popular band "Flayer" have announced that they are going to "make their exit" with a world tour. Of course, they will visit Berland as well. There are n cities in Berland. People...
instruction
0
29,725
1
59,450
No
output
1
29,725
1
59,451
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Musicians of a popular band "Flayer" have announced that they are going to "make their exit" with a world tour. Of course, they will visit Berland as well. There are n cities in Berland. People...
instruction
0
29,726
1
59,452
No
output
1
29,726
1
59,453
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. This time you should help a team of researchers on an island in the Pacific Ocean. They research the culture of the ancient tribes that used to inhabit the island many years ago. Overall they'v...
instruction
0
30,349
1
60,698
No
output
1
30,349
1
60,699
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. This time you should help a team of researchers on an island in the Pacific Ocean. They research the culture of the ancient tribes that used to inhabit the island many years ago. Overall they'v...
instruction
0
30,350
1
60,700
No
output
1
30,350
1
60,701
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. This time you should help a team of researchers on an island in the Pacific Ocean. They research the culture of the ancient tribes that used to inhabit the island many years ago. Overall they'v...
instruction
0
30,351
1
60,702
No
output
1
30,351
1
60,703
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. This time you should help a team of researchers on an island in the Pacific Ocean. They research the culture of the ancient tribes that used to inhabit the island many years ago. Overall they'v...
instruction
0
30,352
1
60,704
No
output
1
30,352
1
60,705
Provide tags and a correct Python 3 solution for this coding contest problem. In Absurdistan, there are n towns (numbered 1 through n) and m bidirectional railways. There is also an absurdly simple road network — for each pair of different towns x and y, there is a bidirectional road between towns x and y if and only ...
instruction
0
30,492
1
60,984
Tags: graphs, shortest paths Correct Solution: ``` def bfs(V, start): D = [None] * (n + 1) D[start] = 0 Q = [start] Qstart = 0 while Qstart < len(Q): u = Q[Qstart] Qstart += 1 for v in V[u]: if D[v] is None: D[v] = D[u] + 1 Q.ap...
output
1
30,492
1
60,985
Provide tags and a correct Python 3 solution for this coding contest problem. In Absurdistan, there are n towns (numbered 1 through n) and m bidirectional railways. There is also an absurdly simple road network — for each pair of different towns x and y, there is a bidirectional road between towns x and y if and only ...
instruction
0
30,493
1
60,986
Tags: graphs, shortest paths Correct Solution: ``` from queue import Queue import sys if __name__ == "__main__": def bfs(flag): vis = set() vis |= {1} q = Queue() q.put((1, 0)) while not q.empty(): u, dis = q.get() for v in range(1, n+1): ...
output
1
30,493
1
60,987
Provide tags and a correct Python 3 solution for this coding contest problem. In Absurdistan, there are n towns (numbered 1 through n) and m bidirectional railways. There is also an absurdly simple road network — for each pair of different towns x and y, there is a bidirectional road between towns x and y if and only ...
instruction
0
30,494
1
60,988
Tags: graphs, shortest paths Correct Solution: ``` n, m = map(int, input().split()) d = [[0 for col in range(500)] for lin in range(500)] vet = [0] * 500 for i in range(m): x, y = map(int, input().split()) x -= 1 y -= 1 d[x][y] = 1 d[y][x] = 1 q = [0] l = 0 while l < len(q): for i in range(1,...
output
1
30,494
1
60,989
Provide tags and a correct Python 3 solution for this coding contest problem. In Absurdistan, there are n towns (numbered 1 through n) and m bidirectional railways. There is also an absurdly simple road network — for each pair of different towns x and y, there is a bidirectional road between towns x and y if and only ...
instruction
0
30,495
1
60,990
Tags: graphs, shortest paths Correct Solution: ``` n, m = map(int,input().split()) rails = [set() for u in range(n+1)] for i in range(m): u, v = map(int,input().split()) rails[u].add(v) rails[v].add(u) roads = [set() for u in range(n+1)] for u in range(1,n+1): for v in range(u+1,n+1): if u not in rails[v]: ro...
output
1
30,495
1
60,991
Provide tags and a correct Python 3 solution for this coding contest problem. In Absurdistan, there are n towns (numbered 1 through n) and m bidirectional railways. There is also an absurdly simple road network — for each pair of different towns x and y, there is a bidirectional road between towns x and y if and only ...
instruction
0
30,496
1
60,992
Tags: graphs, shortest paths Correct Solution: ``` import os import sys from io import BytesIO, IOBase import heapq as h from types import GeneratorType BUFSIZE = 8192 class FastIO(IOBase): newlines = 0 def __init__(self, file): import os self.os = os self._fd = file.fileno() ...
output
1
30,496
1
60,993
Provide tags and a correct Python 3 solution for this coding contest problem. In Absurdistan, there are n towns (numbered 1 through n) and m bidirectional railways. There is also an absurdly simple road network — for each pair of different towns x and y, there is a bidirectional road between towns x and y if and only ...
instruction
0
30,497
1
60,994
Tags: graphs, shortest paths Correct Solution: ``` n,m=map(int,input().split()) f=[set() for i in range(n)] g,h=[0]+(n-1)*[10000],[0]+(n-1)*[10000] for i in range(m): u,v=map(int,input().split()) f[u-1].add(v-1) f[v-1].add(u-1) p={i for i in range(1,n)} def findrailway(t): if t==0: for c in f[t]...
output
1
30,497
1
60,995
Provide tags and a correct Python 3 solution for this coding contest problem. In Absurdistan, there are n towns (numbered 1 through n) and m bidirectional railways. There is also an absurdly simple road network — for each pair of different towns x and y, there is a bidirectional road between towns x and y if and only ...
instruction
0
30,498
1
60,996
Tags: graphs, shortest paths Correct Solution: ``` def routes(n, m): distance = [0] * (n + 1) for i in range(n + 1): distance[i] = [1] * (n + 1) for x in range(m): a, b = map(int, input().split()) distance[a][b] = distance[b][a] = 2 x = 3 - distance[1][n] y = [0] * (n + 1) i = 1 d = [n ...
output
1
30,498
1
60,997
Provide tags and a correct Python 3 solution for this coding contest problem. In Absurdistan, there are n towns (numbered 1 through n) and m bidirectional railways. There is also an absurdly simple road network — for each pair of different towns x and y, there is a bidirectional road between towns x and y if and only ...
instruction
0
30,499
1
60,998
Tags: graphs, shortest paths Correct Solution: ``` # n m количество городов, количество железнодорожных перегонов from collections import deque n, m = map(int, input().split()) nodes = list() for i in range(n): nodes.append(set()) use_roads = False for i in range(m): rails_from, rails_to = map(int, input...
output
1
30,499
1
60,999
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. In Absurdistan, there are n towns (numbered 1 through n) and m bidirectional railways. There is also an absurdly simple road network — for each pair of different towns x and y, there is a bidire...
instruction
0
30,500
1
61,000
Yes
output
1
30,500
1
61,001
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. In Absurdistan, there are n towns (numbered 1 through n) and m bidirectional railways. There is also an absurdly simple road network — for each pair of different towns x and y, there is a bidire...
instruction
0
30,501
1
61,002
Yes
output
1
30,501
1
61,003
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. In Absurdistan, there are n towns (numbered 1 through n) and m bidirectional railways. There is also an absurdly simple road network — for each pair of different towns x and y, there is a bidire...
instruction
0
30,502
1
61,004
Yes
output
1
30,502
1
61,005
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. In Absurdistan, there are n towns (numbered 1 through n) and m bidirectional railways. There is also an absurdly simple road network — for each pair of different towns x and y, there is a bidire...
instruction
0
30,503
1
61,006
Yes
output
1
30,503
1
61,007
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. In Absurdistan, there are n towns (numbered 1 through n) and m bidirectional railways. There is also an absurdly simple road network — for each pair of different towns x and y, there is a bidire...
instruction
0
30,504
1
61,008
No
output
1
30,504
1
61,009
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. In Absurdistan, there are n towns (numbered 1 through n) and m bidirectional railways. There is also an absurdly simple road network — for each pair of different towns x and y, there is a bidire...
instruction
0
30,505
1
61,010
No
output
1
30,505
1
61,011
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. In Absurdistan, there are n towns (numbered 1 through n) and m bidirectional railways. There is also an absurdly simple road network — for each pair of different towns x and y, there is a bidire...
instruction
0
30,506
1
61,012
No
output
1
30,506
1
61,013
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. In Absurdistan, there are n towns (numbered 1 through n) and m bidirectional railways. There is also an absurdly simple road network — for each pair of different towns x and y, there is a bidire...
instruction
0
30,507
1
61,014
No
output
1
30,507
1
61,015
Provide tags and a correct Python 3 solution for this coding contest problem. Barney lives in NYC. NYC has infinite number of intersections numbered with positive integers starting from 1. There exists a bidirectional road between intersections i and 2i and another road between i and 2i + 1 for every positive integer ...
instruction
0
30,545
1
61,090
Tags: brute force, data structures, implementation, trees Correct Solution: ``` from math import log2 class Node: def __init__(self, level, left, right, parent, val): self.val = val self.level = level self.left = left self.right = right self.parent = parent tree = dict() d...
output
1
30,545
1
61,091
Provide tags and a correct Python 3 solution for this coding contest problem. Barney lives in NYC. NYC has infinite number of intersections numbered with positive integers starting from 1. There exists a bidirectional road between intersections i and 2i and another road between i and 2i + 1 for every positive integer ...
instruction
0
30,546
1
61,092
Tags: brute force, data structures, implementation, trees Correct Solution: ``` def main(): d = {} for _ in range(int(input())): c, *l = input().split() if c == "1": v, u, w = map(int, l) while u != v: if u < v: d[v] = d.get(v, 0) + w ...
output
1
30,546
1
61,093
Provide tags and a correct Python 3 solution for this coding contest problem. Barney lives in NYC. NYC has infinite number of intersections numbered with positive integers starting from 1. There exists a bidirectional road between intersections i and 2i and another road between i and 2i + 1 for every positive integer ...
instruction
0
30,547
1
61,094
Tags: brute force, data structures, implementation, trees Correct Solution: ``` def UCLN(a,b): while (a!=b): if a > b: a = a//2 else: b = b//2 return a def find_path(u,v): ucln = UCLN(u,v) arr1 = [] arr2 = [] while (u >= ucln): arr1.append(u) ...
output
1
30,547
1
61,095
Provide tags and a correct Python 3 solution for this coding contest problem. Barney lives in NYC. NYC has infinite number of intersections numbered with positive integers starting from 1. There exists a bidirectional road between intersections i and 2i and another road between i and 2i + 1 for every positive integer ...
instruction
0
30,548
1
61,096
Tags: brute force, data structures, implementation, trees Correct Solution: ``` def path_to_root(n): path = [n] while n != 1: if n % 2: path.append((n - 1) // 2) n = (n - 1) // 2 else: path.append(n // 2) n //= 2 return path def path_beetwen(...
output
1
30,548
1
61,097
Provide tags and a correct Python 3 solution for this coding contest problem. Barney lives in NYC. NYC has infinite number of intersections numbered with positive integers starting from 1. There exists a bidirectional road between intersections i and 2i and another road between i and 2i + 1 for every positive integer ...
instruction
0
30,549
1
61,098
Tags: brute force, data structures, implementation, trees Correct Solution: ``` #!/usr/bin/env python3 # -*- coding: utf-8 -*- """ Created on Wed Jul 15 23:50:55 2020 @author: shailesh """ from collections import defaultdict def find_cost(node_1,node_2,intersect_dict): new_dict = defaultdict(lambda : 0) co...
output
1
30,549
1
61,099
Provide tags and a correct Python 3 solution for this coding contest problem. Barney lives in NYC. NYC has infinite number of intersections numbered with positive integers starting from 1. There exists a bidirectional road between intersections i and 2i and another road between i and 2i + 1 for every positive integer ...
instruction
0
30,550
1
61,100
Tags: brute force, data structures, implementation, trees Correct Solution: ``` q = int(input()) def get_path(u, v): u2 = u v2 = v u_visited = set() while u2 > 1: u_visited.add(u2) u2 = u2 // 2 u_visited.add(1) v2_path = [] while v2 not in u_visited: v2_path.append(...
output
1
30,550
1
61,101
Provide tags and a correct Python 3 solution for this coding contest problem. Barney lives in NYC. NYC has infinite number of intersections numbered with positive integers starting from 1. There exists a bidirectional road between intersections i and 2i and another road between i and 2i + 1 for every positive integer ...
instruction
0
30,551
1
61,102
Tags: brute force, data structures, implementation, trees Correct Solution: ``` q = int(input()) d = {} for sfsdfdsg in range(q): L = [int(x) for x in input().split()] if L[0] == 1: a, b, w = L[1:] while a != b: if a < b: a, b = b, a c = a>>1 i...
output
1
30,551
1
61,103
Provide tags and a correct Python 3 solution for this coding contest problem. Barney lives in NYC. NYC has infinite number of intersections numbered with positive integers starting from 1. There exists a bidirectional road between intersections i and 2i and another road between i and 2i + 1 for every positive integer ...
instruction
0
30,552
1
61,104
Tags: brute force, data structures, implementation, trees Correct Solution: ``` from sys import stdin from collections import * def arr_inp(n): return [int(x) for x in stdin.readline().split()] def lca(u, v, w): res = 0 while u != v: if u < v: u, v = v, u if w: me...
output
1
30,552
1
61,105
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Barney lives in NYC. NYC has infinite number of intersections numbered with positive integers starting from 1. There exists a bidirectional road between intersections i and 2i and another road b...
instruction
0
30,553
1
61,106
Yes
output
1
30,553
1
61,107
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Barney lives in NYC. NYC has infinite number of intersections numbered with positive integers starting from 1. There exists a bidirectional road between intersections i and 2i and another road b...
instruction
0
30,554
1
61,108
Yes
output
1
30,554
1
61,109
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Barney lives in NYC. NYC has infinite number of intersections numbered with positive integers starting from 1. There exists a bidirectional road between intersections i and 2i and another road b...
instruction
0
30,555
1
61,110
Yes
output
1
30,555
1
61,111
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Barney lives in NYC. NYC has infinite number of intersections numbered with positive integers starting from 1. There exists a bidirectional road between intersections i and 2i and another road b...
instruction
0
30,556
1
61,112
Yes
output
1
30,556
1
61,113
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Barney lives in NYC. NYC has infinite number of intersections numbered with positive integers starting from 1. There exists a bidirectional road between intersections i and 2i and another road b...
instruction
0
30,557
1
61,114
No
output
1
30,557
1
61,115
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Barney lives in NYC. NYC has infinite number of intersections numbered with positive integers starting from 1. There exists a bidirectional road between intersections i and 2i and another road b...
instruction
0
30,558
1
61,116
No
output
1
30,558
1
61,117
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Barney lives in NYC. NYC has infinite number of intersections numbered with positive integers starting from 1. There exists a bidirectional road between intersections i and 2i and another road b...
instruction
0
30,559
1
61,118
No
output
1
30,559
1
61,119
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response. Barney lives in NYC. NYC has infinite number of intersections numbered with positive integers starting from 1. There exists a bidirectional road between intersections i and 2i and another road b...
instruction
0
30,560
1
61,120
No
output
1
30,560
1
61,121