#include<stdio.h>
#define PI 3.141592635
int main()
{
	int i,n,year;
	float x,y,s;
	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		scanf("%f%f",&x,&y);
		s=0.5*PI*(x*x+y*y);
		if(s%50==0)
			year=s/50;
		else
			year=s/50+1;
		printf("Property %d:This property will begin eroding in year %d.\n",i+1,year);
	}
	printf("END OF OUTPUT.\N");
	return 0;
}

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