> #include<stdio.h>
> #include<math.h>
> #define pi acos(-1)
> 
> int main()
> {
>     int n,i;
>     float x,y;
>     double area;
>     
>     scanf("%d",&n);
>     for(i=1;i<=n;i++)
>     {
>               scanf("%f %f",&x,&y);
>               area=pi*(x*x+y*y);
>               printf("Property %d:This property will begin eroding in year%d.\n",i,(int)area/100+1);
>     }
>     printf("END OF OUTPUT.\n");
>     return 0;
> }