#include<iostream>
#include<math.h>
using namespace std;
float R(float x,float y)
{
	return sqrt(x*x+y*y);
};
int year(float r)
{
	int year=0;
	float area=1.5707963*r*r;
	for(float i=0;i<area;i+=50.0)
	{
		year++;
	}
	return year;
};
int main()
{
	int N;
	cin>>N;
	float x[N],y[N],r;
	for(int j=0;j<N;j++)
	{
		cin>>x[j]>>y[j];
		r=R(x[j],y[j]);
		cout<<"Property "<<j+1<<": This property will begin eroding in year "<<year(r)<<endl;
	}
	cout << "END OF OUTPUT."<<endl;
	return 0;
}

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