HDU 1065 - I Think I Need a Houseboat

#include <iostream>
#include <cstdio>
#include <cmath>
using namespace std;
double a,b;
int n;
int main()
{
scanf("%d",&n);
for(int k=1;k<=n;k++)
{
for(int i=1;i<=n;i++)
{
scanf("%lf%lf",&a,&b);
int ans=(a*a+b*b)*(3.1415926)/100;
printf("Property %d: This property will begin eroding in year %d.\n",k++,ans+1);
}
puts("END OF OUTPUT.");
}
}