zoj-1047-I Think I Need a Houseboat

#include<stdio.h>
#include<string.h>
#include<algorithm>
#include<math.h>
#define PI 3.1415926
using namespace std;
int main()
{
int n,t;
double x,y,k;
scanf("%d",&n);
for(int i=1;i<=n;i++)
{
scanf("%lf%lf",&x,&y);
k=(PI*(x*x+y*y))/100.+0.499;
printf("Property %d: This property will begin eroding in year %.0lf.\n",i,k);
}
printf("END OF OUTPUT.\n");
return 0;
}