Submission #1293280
Source Code Expand
#include<iostream> #include<string> #include<cmath> #include<queue> #include<map> #include<set> #include<list> #include<iomanip> #include<vector> #include<functional> #include<algorithm> #include<cstdio> #include<unordered_map> typedef long long ll; typedef long double ld; #define int long long using namespace std; int pa[100001]; int root(int x) { if (pa[x] == x) return x; return pa[x] = root(pa[x]); } void unite(int x, int y) { x = root(x); y = root(y); pa[x] = y; } bool same(int x, int y) { return pa[x] == pa[y]; } signed main() { int n, m; cin >> n >> m; for (int i = 1; i <= n; i++) pa[i] = i; for (int i = 0; i < m; i++) { int a, b; cin >> a >> b; unite(a, b); } int sum = 0; for (int i = 1; i <= n; i++) { if (i == pa[i]) sum++; } cout << sum - 1 << endl; getchar(); getchar(); }
Submission Info
Submission Time | |
---|---|
Task | B - 道路工事 |
User | Thistle |
Language | C++14 (GCC 5.4.1) |
Score | 100 |
Code Size | 871 Byte |
Status | AC |
Exec Time | 59 ms |
Memory | 1024 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 | 42 ms | 256 KB |
16.txt | AC | 2 ms | 1024 KB |
17.txt | AC | 2 ms | 1024 KB |
18.txt | AC | 2 ms | 1024 KB |
19.txt | AC | 59 ms | 1024 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 |