Submission #8893462
Source Code Expand
// _/ _/ _/_/_/ _/ //_/_/_/_/ _/_/ _/_/_/_/ _/_/ _/ _/_/ // _/ _/ _/ _/ _/ _/ _/_/_/ _/ //_/ _/ _/ _/ _/ _/ _/ _/ _/ // _/_/ _/_/ _/_/ _/_/ _/_/ _/ #include<iostream> #include<algorithm> #include<cmath> #include<iomanip> #include<set> #include<map> #include<queue> #include<vector> using namespace std; typedef long long ll; const int MOD=1e9+7; const double pi=acos(-1); const int inf=1e9; const ll INF=1e18; int n,m,par[100005]={},a,b; int find(int x) { if(par[x]==x) { return x; } return par[x]=find(par[x]); } bool same(int x,int y) { return find(x)==find(y); } void unit(int x,int y) { x=find(x); y=find(y); if(x!=y) { par[x]=y; } } int main() { cin.tie(0),cout.tie(0); ios::sync_with_stdio(false); cin >> n >> m; for(int i=0; i<n; i++) { par[i]=i; } for(int i=0; i<m; i++) { cin >> a >> b; a--,b--; if(!same(a,b)) { n--; unit(a,b); } } cout << n-1 << endl; }
Submission Info
Submission Time | |
---|---|
Task | B - 道路工事 |
User | toto61 |
Language | C++14 (GCC 5.4.1) |
Score | 100 |
Code Size | 1102 Byte |
Status | AC |
Exec Time | 20 ms |
Memory | 640 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 100 / 100 | ||||
Status |
|
|
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 | 1 ms | 256 KB |
1.txt | AC | 1 ms | 256 KB |
10.txt | AC | 1 ms | 256 KB |
11.txt | AC | 1 ms | 256 KB |
12.txt | AC | 1 ms | 256 KB |
13.txt | AC | 1 ms | 256 KB |
14.txt | AC | 1 ms | 256 KB |
15.txt | AC | 15 ms | 256 KB |
16.txt | AC | 1 ms | 640 KB |
17.txt | AC | 1 ms | 640 KB |
18.txt | AC | 1 ms | 640 KB |
19.txt | AC | 20 ms | 640 KB |
2.txt | AC | 1 ms | 256 KB |
3.txt | AC | 1 ms | 256 KB |
4.txt | AC | 1 ms | 256 KB |
5.txt | AC | 1 ms | 256 KB |
6.txt | AC | 1 ms | 256 KB |
7.txt | AC | 1 ms | 256 KB |
8.txt | AC | 1 ms | 256 KB |
9.txt | AC | 1 ms | 256 KB |
sample1.txt | AC | 1 ms | 256 KB |
sample2.txt | AC | 1 ms | 256 KB |