nylg-159-I Think I Need a Houseboat

本题思路是根据给出的坐标算出以坐标为边界的半圆的面积是多少，用面积除以每年侵蚀的面积50 就可以得出是多少年侵蚀

#include<stdio.h>
#include<algorithm>
#include<functional>
#define PI 3.1415926
using namespace std;
int main()
{
    int n,i;
    while(scanf("%d",&n)!=EOF)
    {
        double x,y;
        for(i=1;i<=n;i++)
        {
            scanf("%lf%lf",&x,&y);
            printf("Property %d: This property will begin eroding in year %d.
",i,int((x*x+y*y)*PI/100)+1);
        }
        printf("END OF OUTPUT.
");
    }
    return 0;
}

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