> #include <iostream>
> using namespace std;
> #define PI 3.1415926
> int main()
> {
>    int times=0;
>    cin>>times;
>    double XPos=0;
>    double YPos=0;
>    int index=0;
>    while(index++<times)
>    {
>       cin>>XPos>>YPos;
>       double Years=(XPos*XPos+YPos*YPos)*PI/50;
>       int ret=(int)Years;
>       if(Years-ret>1e-6)
>          ret=ret+1;
>       cout<<"Property "<<index<<": This property will begin eroding in year "<<ret<<"."<<endl; 
>       
>     }
>    cout<<"END OF OUTPUT."<<endl;
>    return 0;
> }