#include <stdio.h>

int lazy_sum(int *ar, int wdth, int hght) {
  int sum = 0;
  for(int x = 0; x < wdth; ++x) {
    for(int y = 0; y < hght; ++y) {
      sum += ar[x+y*wdth];
      if (sum >= 30) {
        goto done;
      }
    }
  }
  return sum;
 done:
  return 30;
}

int main(int argc, char** argv) {
  int ar[10000];
  int result = lazy_sum(ar, 100, 100);
  printf("Sum: %d\n", result);
}