Nested Squares

This is my only ACCEPTED submission during the Dhaka regionals !!!  
____________________________________________________________________
Question: Nested Squares
____________________________________________________________________

#include "iostream.h"

int main()
{
   int ns;
   cin >> ns;
   for(int i = 1; i <= ns; i++) {
       cout << "Square " << i << ":" << endl;
       char strin[50002];
       int nq;
       cin >> strin >> nq;
       int len = strlen(strin);
       int doublen = 2 * len;

       for(int j = 1; j <= nq; j++) {
           cout << "Query " << j << ":" << endl;
           int sx, sy, bx, by;
           cin >> sx >> sy >> bx >> by;

           for(int k = sx; k <= bx; k++) {
               for(int l = sy; l <= by; l++) {
                   int x = k, y = l;
                   if(k > len) x = doublen - k;
                   if(l > len) y = doublen - l;
                   int min = (x < y)?x:y;
                   cout << strin[min-1];
               }
               cout << endl;
           }
       }
       cout << endl;
   }
   return 0;
}
____________________________________________________________________