Submission #1219516

#	Time	Username	Problem	Language	Result	Execution time	Memory
1219516		lizi14	Star triangles (IZhO11_triangle)	C++20	0 / 100	2095 ms	416 KiB

triangle

#include <bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin>>n;
    vector<pair<int,int>>v(n);
    for(int i=0; i<n; i++){
        int j,k;
        cin>>j>>k;
        pair<int,int>p={j,k};
        v[i]=p;
    }
    long long ans=0;
    sort(v.begin(),v.end());
    for(int i=0; i<v.size(); i++){
        for(int j=0; j<v.size(); j++){
            if(v[j].first==v[i].first && j!=i){
                for(int t=0; t<v.size(); t++){
                    if(t!=i && t!=j){
                        if(v[t].second==v[i].second ){
                            ans++;
                        }
                        if(v[t].second==v[j].second)ans++;    
                    }
                    
                }
            }
        }
    }
    cout<<ans/2<<endl;
}

• Subtask 1: 0 / 100