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Submission #698770

# Submission time Handle Problem Language Result Execution time Memory
698770 2023-02-14T09:37:04 Z vjudge1 Duathlon (APIO18_duathlon) C++17
0 / 100
 15 ms 852 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long
#define endl '\n'

const int M = 1e4+5, K = 4e2+2, MOD = 1e9+7;
vector<int> node[M];
bitset<10005> vis;
int dist[M];

void dfs(int s, int p = 0) {
    if (!p) p = s, vis = 0, dist[s] = 0;
    dist[s] = dist[p] + 1;
    vis[s] = true;
    for (int i:node[s])
        if (!vis[i]) dfs(i, s);
}

signed main() {
    cin.tie(0)->sync_with_stdio(0);

    int n, m;
    cin >> n >> m;

    for (int i = 1; i <= m; i++) {
        int a, b;
        cin >> a >> b;
        node[a].push_back(b);
        node[b].push_back(a);
    }

    int ans = 0;
    for (int i = 1; i <= n; i++) {
        dfs(i);
        for (int j = i+1; j <= n; j++) {
            ans += max(dist[j]-2, 0ll);
        }
    } cout << ans << endl;

    return 0;
}
/*
1 2 3 4 5 6 7 8
1 2 2 4 5 6 7 8
3
SRS RR SRRRS RRRR
4 2 4
3 1 1 10
9 2 2 4
7 2 5 7
4 1 8 10
5 3
5 6
5 9
1 10
------
2 1 3
1 1 1 4
1 1 2 5
1 3
1 5
1 7
------
1 1 1
100000000 1 1 1
1 1
------
*/

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 468 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 468 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 852 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 12 ms 640 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 852 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 15 ms 596 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 852 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 468 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 468 KB Output isn't correct
2 Halted 0 ms 0 KB -