Submission #2499950
Source Code Expand
#include <bits/stdc++.h> using namespace std; #define max(a,b) ((a>b)?(a):(b)) #define min(a,b) ((a<b)?(a):(b)) typedef long long LL; int uf[100000]; set<int> K[100000]; set<int> P[100000]; int Find(int num){ if(uf[num]==num){ return num; }else{ uf[num]=Find(uf[num]); return uf[num]; } } int main(){ int n,m; cin >> n >> m; vector<int> p(n); for(int i=0;i<n;i++){ cin >> p[i]; p[i]--; } for(int i=0;i<n;i++){ uf[i]=i; } int x,y; for(int i=0;i<m;i++){ cin >> x >> y; x--; y--; x=Find(x); y=Find(y); uf[x]=y; } for(int i=n;i>=0;i--){ Find(i); } for(int i=0;i<n;i++){ K[uf[i]].insert(i); P[uf[i]].insert(p[i]); } int ans=0; for(int i=0;i<n;i++){ for(set<int>::iterator itr=K[i].begin();itr!=K[i].end();itr++){ if(P[i].find((*itr))!=P[i].end()){ ans++; } } } cout << ans << endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | D - Equals |
User | yamunaku |
Language | C++14 (GCC 5.4.1) |
Score | 400 |
Code Size | 985 Byte |
Status | AC |
Exec Time | 176 ms |
Memory | 19840 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 | 5 ms | 9600 KB |
0_001.txt | AC | 5 ms | 9600 KB |
0_002.txt | AC | 5 ms | 9600 KB |
0_003.txt | AC | 5 ms | 9600 KB |
1_004.txt | AC | 47 ms | 9728 KB |
1_005.txt | AC | 104 ms | 19712 KB |
1_006.txt | AC | 176 ms | 19712 KB |
1_007.txt | AC | 5 ms | 9600 KB |
1_008.txt | AC | 5 ms | 9600 KB |
1_009.txt | AC | 5 ms | 9600 KB |
1_010.txt | AC | 5 ms | 9600 KB |
1_011.txt | AC | 5 ms | 9600 KB |
1_012.txt | AC | 5 ms | 9600 KB |
1_013.txt | AC | 5 ms | 9600 KB |
1_014.txt | AC | 7 ms | 9600 KB |
1_015.txt | AC | 5 ms | 9728 KB |
1_016.txt | AC | 5 ms | 9728 KB |
1_017.txt | AC | 6 ms | 9728 KB |
1_018.txt | AC | 45 ms | 9728 KB |
1_019.txt | AC | 47 ms | 19712 KB |
1_020.txt | AC | 47 ms | 19840 KB |
1_021.txt | AC | 48 ms | 19712 KB |
1_022.txt | AC | 150 ms | 19712 KB |