HDOJ 1065（PE）

#include <iostream>

using namespace std;

int main()

{

int m;

cin>>m;

for(int j=0;j<m;j++)

{

    double x,y;

    double area;

    cin>>x>>y;

    double r=x*x+y*y;

    area=3.1415926*r*.5;

    int n=static_cast<int>((area/50)+0.9999999);

    cout<<"Property "<<j+1<<": This property will begin eroding in year "<<n<<"."<<endl;

}

    cout<<"END OF OUTPUT.";

    return 0;

}