Submission #1039228

#	Time	Username	Problem	Language	Result	Execution time	Memory
1039228		Trustfulcomic	Triangles (CEOI18_tri)	C++14	35 / 100	7 ms	456 KiB

tri

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

int main(){
    int n = get_n();

    int res = 0;
    for (int i = 0; i<n; i++){
        for (int j = i+1; j<n; j++){
            bool proti = false;
            bool po = false;
            for (int k = 0; k<n; k++){
                if (i == k || j == k) continue;
                if (is_clockwise(i+1,j+1,k+1)){
                    po = true;
                } else {
                    proti = true;
                }
                if (po && proti) break;
            }
            if(!po || !proti) res++;
        }
    }

    if (n <= 3){
        cout << n << endl;
    } else {
        cout << res << endl;
    }
}

• Subtask 1: 15 / 15
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 20 / 20
• Subtask 5: 0 / 25