Submission #8424355
Source Code Expand
import sys input = sys.stdin.readline class UnionFind(): def __init__(self, n): self.n = n self.parents = [-1] * n def find(self, x): if self.parents[x] < 0: return x else: self.parents[x] = self.find(self.parents[x]) return self.parents[x] def union(self, x, y): x = self.find(x) y = self.find(y) if x == y: return if self.parents[x] > self.parents[y]: x, y = y, x self.parents[x] += self.parents[y] self.parents[y] = x def same(self, x, y): return self.find(x) == self.find(y) def main(): N, M = map(int, input().split()) P = list(map(int, input().split())) uf = UnionFind(N) for i in range(M): x, y = map(int, input().split()) uf.union(x-1, y-1) ans = 0 for i in range(N): if uf.same(P[i]-1, i): ans += 1 print(ans) if __name__ == '__main__': main()
Submission Info
Submission Time | |
---|---|
Task | D - Equals |
User | takeuchi839 |
Language | PyPy3 (2.4.0) |
Score | 400 |
Code Size | 1040 Byte |
Status | AC |
Exec Time | 663 ms |
Memory | 84368 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 400 / 400 | ||||
Status |
|
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Set Name | Test Cases |
---|---|
Sample | 0_000.txt, 0_001.txt, 0_002.txt, 0_003.txt |
All | 0_000.txt, 0_001.txt, 0_002.txt, 0_003.txt, 1_004.txt, 1_005.txt, 1_006.txt, 1_007.txt, 1_008.txt, 1_009.txt, 1_010.txt, 1_011.txt, 1_012.txt, 1_013.txt, 1_014.txt, 1_015.txt, 1_016.txt, 1_017.txt, 1_018.txt, 1_019.txt, 1_020.txt, 1_021.txt, 1_022.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
0_000.txt | AC | 163 ms | 38256 KB |
0_001.txt | AC | 162 ms | 38384 KB |
0_002.txt | AC | 160 ms | 38256 KB |
0_003.txt | AC | 161 ms | 38256 KB |
1_004.txt | AC | 262 ms | 41816 KB |
1_005.txt | AC | 315 ms | 53648 KB |
1_006.txt | AC | 663 ms | 84368 KB |
1_007.txt | AC | 161 ms | 38256 KB |
1_008.txt | AC | 161 ms | 38256 KB |
1_009.txt | AC | 161 ms | 38256 KB |
1_010.txt | AC | 160 ms | 38256 KB |
1_011.txt | AC | 160 ms | 38256 KB |
1_012.txt | AC | 161 ms | 38256 KB |
1_013.txt | AC | 168 ms | 38640 KB |
1_014.txt | AC | 183 ms | 40176 KB |
1_015.txt | AC | 164 ms | 38384 KB |
1_016.txt | AC | 167 ms | 38384 KB |
1_017.txt | AC | 177 ms | 39152 KB |
1_018.txt | AC | 274 ms | 42984 KB |
1_019.txt | AC | 208 ms | 52752 KB |
1_020.txt | AC | 208 ms | 52880 KB |
1_021.txt | AC | 221 ms | 52880 KB |
1_022.txt | AC | 636 ms | 82448 KB |