> #include <stdio.h>
> #include <stdlib.h>
> #define pi 3.14159265358979323846264338327950288 
> int k=0;
> double r;
> int n; 
> double sqare; 
> int main( )
> {
>      int i; 
>      double x,y; 
>      scanf("%d",&n);
>      for (i=1;i<=n;i++)
>        {
>            scanf("%lf%lf",&x,&y);
>            r=x*x+y*y;
>            k=0; 
>            while (r>sqare)
>            {
>                sqare=1.0; 
>                k++;
>                sqare=sqare*100*k/pi;
>            } 
>            printf("Property %d: This property will begin eroding in year %d.\n",i,k); 
>        }
>      printf("END OF OUTPUT.\n");
>      system("pause");
>      return 0;
> }