Đấu hậu

#include <iostream>
using namespace std;
int main(){
    bool found=false;
    int n;
    cin >> n;
    int x[10000], y[10000];
    for(int i=0; i<n ;i++){
        cin >> x[i]>> y[i];
    }
    for(int i=0; i<n-1; i++){
        for(int j=i+1; j<n; j++){
            if(x[i]==x[j]) {
                cout<<"yes";
                found=true;
                break;
            }
            if(y[i]==y[j]) {
                cout<<"yes";
                found=true;
                break;
            }
            if(x[i]-x[j]==y[i]-y[j]) {
                cout<<"yes";
                found=true;
                break;
            }
        }
        if(found) break;
    }
    if(found==false) cout<<"no";
    return 0;
}