POJ 1005 I Think I Need a Houseboat

#include <stdio.h>
#include <math.h>
#define PI 3.1415926
int main()
{
    int T,ncase=0,ans;
    double x,y,r;
    scanf("%d",&T);
    while(T--)
    {
        scanf("%lf%lf",&x,&y);
        r=sqrt(x*x+y*y);
        ans=(int)ceil(PI*r*r/2/50);
        printf("Property %d: This property will begin eroding in year %d.\n",++ncase,ans);
    }
    printf("END OF OUTPUT.\n");
    return 0;
}