#include <stdio.h>
#include <math.h>

int n;

int main()
{
    for(int p = 1 ; p <= 30 ; p++ )
    {
        char in[110], out[110];
        sprintf(in,".%d.in",p); sprintf(out,".%d.out", p);
        freopen(in,"r",stdin); freopen(out,"w",stdout);
        scanf("%d", &n);
        printf("%d", (n+1)*(n+1));
    }
}