제출 #568696

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
568696		inluminas	Duathlon (APIO18_duathlon)	C++17	0 / 100	18 ms	1568 KiB

count_triplets

#include"bits/stdc++.h"
using namespace std;

#define ll long long
#define endl "\n"
#define fastio ios_base::sync_with_stdio(false)
#define inf LLONG_MAX
#define l first
#define r second

int main(){
	fastio;

	int n,m;
	cin>>n>>m;
	for(int i=1;i<=m;i++){
		int u,v;
		cin>>u>>v;
	}

	ll ans=n*(n-1)*(n-2);
	ans/=6;
	cout<<ans*2<<endl;
	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