func_code_string: #include <bits/stdc++.h>   using namespace std;   int n;   int main() {     ios_base::sync_with_stdio(false);     int n, x[10], y[10], nx[10], ny[10];     cin >> n;     for (int i = 0; i < n; i++) cin >> x[i] >> y[i] >> nx[i] >> ny[i];     int mnx = 1000000, mny = 1000000, mxx = 0, mxy = 0;     for (int i = 0; i < n; i++) {       mnx = min(mnx, x[i]);       mny = min(mny, y[i]);       mxx = max(mxx, nx[i]);       mxy = max(mxy, ny[i]);     }     long long area = (mxx - mnx) * (mxy - mny);     long long realarea = 0;     for (int i = 0; i < n; i++) {       realarea += (nx[i] - x[i]) * (ny[i] - y[i]);     }     if (mxx - mnx == mxy - mny && area == realarea)       printf( YES );     else       printf( NO );   }   