Submission #6128255

Source Code Expand

import sys
input = sys.stdin.readline

N,M = map(int,input().split())
if M == 0:
  print(N-1)
  exit()
from scipy.sparse import *
import numpy as np
AB = np.array([input().split() for _ in range(M)], dtype = np.int32)

AB -= 1 # 0-indexed
graph = csr_matrix((np.ones(M), (AB[:,0], AB[:,1])), shape=(N,N))

x, _ = csgraph.connected_components(graph)
answer = x - 1 # 連結成分をx個から1個に減らす
print(answer)

Submission Info

Submission Time
Task B - 道路工事
User maspy
Language Python (3.4.3)
Score 100
Code Size 439 Byte
Status AC
Exec Time 291 ms
Memory 48408 KiB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 100 / 100
Status
AC × 2
AC × 22
Set Name Test Cases
Sample sample1.txt, sample2.txt
All 0.txt, 1.txt, 10.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, 2.txt, 3.txt, 4.txt, 5.txt, 6.txt, 7.txt, 8.txt, 9.txt, sample1.txt, sample2.txt
Case Name Status Exec Time Memory
0.txt AC 17 ms 3060 KiB
1.txt AC 17 ms 3060 KiB
10.txt AC 241 ms 17448 KiB
11.txt AC 165 ms 13648 KiB
12.txt AC 17 ms 3060 KiB
13.txt AC 165 ms 13628 KiB
14.txt AC 171 ms 13728 KiB
15.txt AC 277 ms 46588 KiB
16.txt AC 17 ms 3060 KiB
17.txt AC 171 ms 14892 KiB
18.txt AC 174 ms 14844 KiB
19.txt AC 291 ms 48408 KiB
2.txt AC 17 ms 3060 KiB
3.txt AC 17 ms 3060 KiB
4.txt AC 17 ms 3060 KiB
5.txt AC 170 ms 13720 KiB
6.txt AC 170 ms 13720 KiB
7.txt AC 166 ms 13720 KiB
8.txt AC 17 ms 3060 KiB
9.txt AC 167 ms 13628 KiB
sample1.txt AC 166 ms 13676 KiB
sample2.txt AC 164 ms 13620 KiB