【水滴石穿】1005

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int n;
    double x,y,s,pi=3.141592654;
    int year,i=0;
    scanf("%d",&n);
    while(n--)
    {
        i++;
        scanf("%lf%lf",&x,&y);
        s=0.5*pi*(x*x+y*y);
        year=(int)s/50;
        printf("Property %d: This property will begin eroding in year %d.\n",i,year+1);
    }
    printf("END OF OUTPUT.");
    return 0;
}