Perter Smoke

#include<stdio.h>
int main()
{
    int n, p, k, l;
    while(scanf("%d %d", &n, &k)!=EOF){
        p=0;
        l=n;
        while(k<=n){
            n=n/k;
            p+=n;
        }
            printf("%d\n", l+p);
    }
    return 0;
}