제출 #463515

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
463515		fuad27	Triangles (CEOI18_tri)	C++14	0 / 100	1 ms	204 KiB

tri

#include<bits/stdc++.h>
#include "trilib.h"
using namespace std;
typedef long long ll;
typedef long double ld;
#define vii vector<pair<int, int>>
#define vi vector<int>
#define vl vector<long long>
#define vll vector<pair<long long, long long>>
#define mp make_pair
#define pb push_back
#define rep(i, a, b) for(int i = a;i<=b;i++)
#define f first
#define s second
#define FIO ios_base::sync_with_stdio(0);cin.tie(0);
#define start int tt;cin>>tt;rep(testcase, 1, tt)
#define print(k) cout<<"Case #"<<testcase<<": "<<k<<"\n";
#define endl "\n"
#define DEBUG(k) cerr<<k<<"\n";

int main () {
	int n = get_n(), ans = 0;
	rep(i, 1, n) {
		rep(j, i+1, n) {
			bool check = true;
			rep(k, 1, n) {
				if(k == i or k == j)continue;
				check &= is_clockwise(i, j, k);
			}
			ans+=check;
		}
	}
	cout<<ans<<endl;
}

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