제출 #1115760

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1115760		gustavo_d	철인 이종 경기 (APIO18_duathlon)	C++17	0 / 100	29 ms	6216 KiB

count_triplets

// 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];

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);
	}
	if (n < 3) cout << 0 << endl;
	else cout << (ll)(n) * (ll)(n - 1) * (ll)(n - 2) / 3LL << '\n';

	return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 11
• Subtask 3: 0 / 8
• Subtask 4: 0 / 10
• Subtask 5: 0 / 13
• Subtask 6: 0 / 15
• Subtask 7: 0 / 20
• Subtask 8: 0 / 8
• Subtask 9: 0 / 10