oj.uz

Submission #1115776

# Submission time Handle Problem Language Result Execution time Memory
1115776 2024-11-21T00:06:14 Z gustavo_d Duathlon (APIO18_duathlon) C++17
8 / 100
 45 ms 14236 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];
bool vis[MAXN];

pair<int, bool> dfs(int v, int pai) {
	vis[v] = true;
	int sz = 1;
	bool cycle = false;
	for (int viz : adj[v]) {
		if (vis[viz]) {
			if (viz != pai) cycle = true;
			continue;
		}
		pair<int, int> res = dfs(viz, v);
		sz += res.first;
		if (res.second) cycle = true;
	}
	return {sz, cycle};
}

ll qty(pair<int, bool> res) {
	int n = res.first; bool cycle = res.second;
	return (ll)(n) * (ll)(n - 1) * (ll)(n - 2) / (ll)(3 - 2*cycle);
}

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);
	}
	ll ans = 0;
	for (int i=0; i<n; i++) {
		if (vis[i]) continue;
		// assert(i==0);
		ans += qty(dfs(i, -1));
	}
	cout << ans << '\n';

	return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2640 KB Output is correct
2 Correct 3 ms 2640 KB Output is correct
3 Correct 2 ms 2824 KB Output is correct
4 Correct 3 ms 2808 KB Output is correct
5 Correct 2 ms 2640 KB Output is correct
6 Correct 2 ms 2640 KB Output is correct
7 Incorrect 2 ms 2640 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2640 KB Output is correct
2 Correct 3 ms 2640 KB Output is correct
3 Correct 2 ms 2824 KB Output is correct
4 Correct 3 ms 2808 KB Output is correct
5 Correct 2 ms 2640 KB Output is correct
6 Correct 2 ms 2640 KB Output is correct
7 Incorrect 2 ms 2640 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 44 ms 13664 KB Output is correct
2 Correct 37 ms 14236 KB Output is correct
3 Correct 34 ms 11156 KB Output is correct
4 Correct 44 ms 13128 KB Output is correct
5 Correct 45 ms 9800 KB Output is correct
6 Correct 34 ms 9752 KB Output is correct
7 Correct 34 ms 8700 KB Output is correct
8 Correct 31 ms 9288 KB Output is correct
9 Correct 30 ms 8016 KB Output is correct
10 Correct 31 ms 8784 KB Output is correct
11 Correct 26 ms 6840 KB Output is correct
12 Correct 30 ms 6728 KB Output is correct
13 Correct 24 ms 6660 KB Output is correct
14 Correct 22 ms 6652 KB Output is correct
15 Correct 17 ms 5960 KB Output is correct
16 Correct 20 ms 5968 KB Output is correct
17 Correct 3 ms 2896 KB Output is correct
18 Correct 3 ms 2820 KB Output is correct
19 Correct 3 ms 2896 KB Output is correct
20 Correct 3 ms 2896 KB Output is correct
21 Correct 3 ms 2676 KB Output is correct
22 Correct 3 ms 2896 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2640 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 29 ms 5968 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 2640 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 27 ms 5968 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2640 KB Output is correct
2 Correct 3 ms 2640 KB Output is correct
3 Correct 2 ms 2824 KB Output is correct
4 Correct 3 ms 2808 KB Output is correct
5 Correct 2 ms 2640 KB Output is correct
6 Correct 2 ms 2640 KB Output is correct
7 Incorrect 2 ms 2640 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2640 KB Output is correct
2 Correct 3 ms 2640 KB Output is correct
3 Correct 2 ms 2824 KB Output is correct
4 Correct 3 ms 2808 KB Output is correct
5 Correct 2 ms 2640 KB Output is correct
6 Correct 2 ms 2640 KB Output is correct
7 Incorrect 2 ms 2640 KB Output isn't correct
8 Halted 0 ms 0 KB -