Obuhvatanje tacaka (S)

// dragutinmajranovic
#include <iostream>
using namespace std;

int kvadrat_rastojanja (int x1, int y1, int x2, int y2)
{
    return (x1-x2)*(x1-x2) + (y1-y2)*(y1-y2);
}

main()
{
      int x[100], y[100], r, n, s, max = 0, xa, ya, a=100, b=100, c=-100, d=-100;

      cin >> r >> n;

      for (int i=0; i<n; i++)
      {
       cin >> x[i] >> y[i];
       if (x[i]<a)
       a = x[i];
       if (y[i]<b)
       b = y[i];
       if (x[i]>c)
       c = x[i];
       if (y[i]>d)
       d = y[i];
      }

     // cout << a << " " << b << " " << c << " " << d << endl;


      for (int i = a; i<c; i++)
      for (int k = b; k<d; k++)
      {
          s = 0;
          for (int j=0; j<n; j++)
          if (kvadrat_rastojanja(i, k , x[j], y[j]) <= r*r)
          s = s + 1;
          if (s > max)
          {
                max = s;
                xa = i;
                ya = k;
          }
      }

      cout << xa << " " << ya << endl;

      system("PAUSE");
}