#include<iostream>
using namespace std;
void main()
{
	int n,year[200];
	float x,y;
	cin>>n;
	for(int i=0;i<n;i++)
	{
		cin>>x>>y;
		if((x==0&&y==0)||y<0)
			return;
		float s=3.1415926*(x*x+y*y);
		year[i]=int(s/100)+1;
	}
	for(int k=0;k<n;k++)
	{
		cout<<"Property "<<k+1<<": This property will begin eroding in year "<<year[k]<<'.'<<endl;
	}
	cout<<"END OF OUTPUT."<<endl;;
}