UVA - 356 .cpp file

#include <bits/stdc++.h>
using namespace std;
#include <math.h>

int main()
{
    int n, p, i, k = 0;
    double t, r;
    while(scanf("%d",&n)==1)
    {
        if(k==1)
            printf("\n");
        p = 8*n-4;
        r = n - 0.5;
        t = 0;
        for(i=1; i<n; i++)
            t +=floor(sqrt(r*r-i*i)); //cout<<t<<endl;
        t *= 4;
        printf("In the case n = %d, %d cells contain segments of the circle.\n",n,p);
        printf("There are %.0lf cells completely contained in the circle.\n",t);
        k = 1;
    }
    return 0;
}