Submission #1051680

#	Time	Username	Problem	Language	Result	Execution time	Memory
1051680		anton	Triangles (CEOI18_tri)	C++17	35 / 100	464 ms	29856 KiB

tri

#include<bits/stdc++.h>
#include"trilib.h"

using namespace std;
int N;


signed main(){
    N = get_n();
    vector<vector<vector<bool>>> above(N, vector<vector<bool>>(N, vector<bool>(N, false))); 

    for(int i = 0; i<N; i++){
        for(int j = i+1; j<N; j++){
            for(int k = j+1; k<N; k++){
                bool this_order = is_clockwise(i+1, j+1, k+1);
                above[i][j][k] = this_order;
                above[j][k][i] = this_order;
                above[k][i][j] = this_order;

                above[k][j][i] = !this_order;
                above[j][i][k] = !this_order;
                above[i][k][j] = !this_order;
                
            }
        }
    }

    int res= 0;
    for(int i = 0; i<N; i++){
        for(int j = 0; j<N; j++){
            int count_above = 0;
            for(int k = 0; k<N; k++){
                if(above[i][j][k]){
                    count_above++;
                }
            }
            if(count_above == N-2){
                res++;
            }
        }
    }

    cout<<res<<endl;
}

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