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Submission #1115797

# Submission time Handle Problem Language Result Execution time Memory
1115797 2024-11-21T01:22:10 Z gustavo_d Duathlon (APIO18_duathlon) C++17
0 / 100
 1000 ms 1048576 KB 
// https://oj.uz/problem/view/APIO18_duathlon > p520
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
const int MAXN = 1e5;
vector<int> adj[MAXN];
ll sz[MAXN]; ll sum_dist[MAXN];
ll ans = 0;

void dfs(int v, int pai) {
	sz[v] = 1; sum_dist[v] = 1;
	for (int viz : adj[v]) {
		if (viz == pai) continue;
		dfs(viz, v);
		sz[v] += sz[viz];
		sum_dist[v] += sum_dist[viz] + sz[viz];
	}

	ll less = 0;
	for (int viz : adj[v]) {
		if (viz == pai) continue;
		ans += 2*(sum_dist[viz] - sz[viz]); // lca sendo ponta
		ans += sum_dist[viz] * (sz[v] - sz[viz] - 1);
		less += sz[viz] * (sz[v] - sz[viz] - 1);
	}
	ans -= less / 2;
}

int main() {
	ios_base::sync_with_stdio(false); cin.tie(NULL);

	int n, m; cin >> n >> m;
	for (int i=0; i<m; i++) {
		int u, v; cin >> u >> v;
		u--; v--;
		adj[u].push_back(v);
		adj[v].push_back(u);
	}
	dfs(0, -1);
	cout << ans << '\n';

	return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 952 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Runtime error 952 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1081 ms 804412 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 4176 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 33 ms 7920 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 4176 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 31 ms 8784 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Runtime error 952 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 952 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -