Submission #8901819


Source Code Expand

#include <bits/stdc++.h>
using namespace std;

#define dump(x) cout << (x) << endl
#define Int int64_t
#define fi first
#define se second
 
Int INF = 1e18;
Int mod = 1e9+7;
//Int mod = 998244353;

Int par[100001];

Int root(Int x) {
    if (x == par[x]) {
        return x;
    }
    else {
        return par[x] = root(par[x]);
    }
}

void unite(Int x, Int y) {
    Int rx = root(x);
    Int ry = root(y);
    if (rx == ry) return;
    par[rx] = ry;
}

int main() {
    Int n, m;
    cin >> n >> m;
    vector<Int> a(m), b(m);
    for (Int i = 0; i < m; i++) {
        cin >> a[i] >> b[i];
    }
    for (Int i = 1; i <= n; i++) {
        par[i] = i;
    }
    for (Int i = 0; i < m; i++) {
        unite(a[i], b[i]);
    }
    map<Int, Int> mp;
    for (Int i = 1; i <= n; i++) {
        mp[root(i)]++;
    }
    dump((Int)mp.size() - 1);
    return 0;
}

Submission Info

Submission Time
Task B - 道路工事
User keep_OC
Language C++14 (GCC 5.4.1)
Score 100
Code Size 907 Byte
Status AC
Exec Time 67 ms
Memory 7296 KB

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 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 44 ms 1792 KB
16.txt AC 38 ms 7296 KB
17.txt AC 37 ms 7296 KB
18.txt AC 24 ms 7296 KB
19.txt AC 67 ms 3584 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