zoj 1049//老死在houseboat。。。

#include"stdio.h"

#define pi 3.14159

int main()

{

    long n, i, t;

    float x, y;

    scanf("%d", &n);

    for (i=1; i<=n; i++)

    {

        scanf("%f%f", &x, &y);

        for (t=1; t < pi * (x * x + y * y) / 100; t++);   //semicircle，半圆 

        printf("Property %d: This property will begin eroding in year %d.\n", i, t);

    }

    printf("END OF OUTPUT.");

    return 0;

}