> # include <iostream.h>
> # include<math.h>
> const double q=acos(-1);
> int main()
> {
> 	int t,n;
> 	float x,y;
> 	double r;
> 	cin>>t;
> 	for(int i=1;i<=t;i++)
> 	{
> 		cin>>x>>y;
> 		if(x!=0&&y>=0)
> 		{
> 		r=sqrt(x*x+y*y);
> 		n=(int)(q*r*r/2)/50;		
> 		cout<<"Property"<<' ' <<i<<":This property will begin eroding in year "<<n+1<<endl;		
> 		}
> 	}
> 		cout<<"END OF OUTPUT"<<endl;
> 		return 0;
> }