I Think I Need a Houseboat

http://acm.zju.edu.cn/show_problem.php?pid=1049

   1 #include <stdio.h>
   2 #include <math.h>
   3 int main() {
   4     int t, i;
   5     scanf("%d", &t);
   6     for(i = 1; i <= t; i++) {
   7         double x, y;
   8         scanf("%lf%lf", &x, &y);
   9         double square_radius = x*x + y*y;
  10         double area = 3.141592653589793 * square_radius * 0.5;
  11         printf("Property %d: This property will begin eroding in year %.0f.\n", i, floor(area / 50.0) + 1);
  12     }
  13     printf("END OF OUTPUT.\n");
  14 }
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