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Submission #374598

# Submission time Handle Problem Language Result Execution time Memory
374598 2021-03-07T14:11:01 Z morato Duathlon (APIO18_duathlon) C++17
0 / 100
 1000 ms 1048580 KB 
#include <bits/stdc++.h>
using namespace std;

const int N = 1e5 + 5;

long long ans;
vector<int> adj[N];
int subtree[N], n;

void dfs(int v, int p = 0) {
	subtree[v] = 1;
	for (int u : adj[v]) if (u != p) {
		dfs(u, v);
		subtree[v] += subtree[u];
	}
	int aux = (v == 1 ? 0 : n - subtree[v]);
	vector<int> pref;
	pref.push_back(aux);
	long long local_ans = 0;
	for (int u : adj[v]) if (u != p) {
		local_ans += pref.back() * subtree[u];
		pref.push_back(pref.back() + subtree[u]);
	}
	ans += 2 * local_ans;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	int m; cin >> n >> m;
	for (int i = 0; i < m; i++) {
		int a, b; cin >> a >> b;
		adj[a].push_back(b);
		adj[b].push_back(a);
	}
	dfs(1);
	cout << ans << '\n';
	return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 586 ms 1048580 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 586 ms 1048580 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 1129 ms 668316 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2796 KB Output is correct
2 Correct 2 ms 2796 KB Output is correct
3 Correct 2 ms 2796 KB Output is correct
4 Correct 3 ms 2796 KB Output is correct
5 Correct 2 ms 2796 KB Output is correct
6 Correct 3 ms 2796 KB Output is correct
7 Correct 3 ms 2796 KB Output is correct
8 Correct 2 ms 2796 KB Output is correct
9 Correct 2 ms 2796 KB Output is correct
10 Incorrect 3 ms 2796 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 74 ms 7532 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2796 KB Output is correct
2 Correct 3 ms 2796 KB Output is correct
3 Runtime error 921 ms 1048580 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 66 ms 7532 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 586 ms 1048580 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 586 ms 1048580 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -