/* [A][M][C][B][N] / [K][R][I][P][6][8] */
#include <bits/stdc++.h>
using namespace std;
const int mod = 104659, inf = 0x3f3f3f3f;
const char sp = ' ', nl = '\n';
ifstream fin("pascal.in");
ofstream fout("pascal.out");

int f(int n, int d) {
    int cnt = 0;
    while (n) n /= d, cnt += n;
    return cnt;
}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    int r, d;
    fin >> r >> d;
    int cnt = 0;
    for (int i = 0; i <= r; ++i) {
        if (f(r, d) - f(i, d) - f(r -i, d) > 0)
            cnt++;
    }
    fout << cnt;
}