#include<stdio.h>
int main()
{
    int n,sum=0,i,sum1=0;
    while(1)
    {
        scanf("%d",&n);
        if(n%2==0 && n!=0)
        {
            for(i=1; i<=5; i++)
            {
                sum=sum+n;
                n+=2;
            }
            printf("%d\n",sum);
        }
        else if(n%2!=0)
        {
            for(i=1,n++; i<=5; i++)
            {
                sum1=sum1+n;
                n+=2;
            }
            printf("%d\n",sum1);
        }
        else if(n==0)
            break;
    }
    return 0;
}