Rectangles

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Question: Rectangles
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#include "iostream.h"

int max(int a, int b) {
  return (a > b)? a : b;
}

int min(int a, int b) {
  return (a < b)? a : b;
}

int main()
{
  int n;
  cin >> n;
  for(int i = 1; i <= n; i++) {
      int m;
      cin >> m;
      int smallx, smally, bigx, bigy;
      cin >> smallx >> smally >> bigx >> bigy;
      int j;
      for(j = 1; j < m; j++) {
          int sx, sy, bx, by;
          cin >> sx >> sy >> bx >> by;
          smallx = max(smallx, sx);
          smally = max(smally, sy);
          bigx = min(bigx, bx);
          bigy = min(bigy, by);
          if(smallx > bigx || smally > bigy) break;
      }
      int dummy;
      while(j++ < (m - 1)) cin >> dummy >> dummy >> dummy >> dummy;
      long long int area = (bigx - smallx) * (bigy - smally);
      if(area <= 0) area = 0;
      cout << "Case " << i << ": " << area << endl;
  }
  return 0;
}

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