#include <stdio.h>

#define MAX_N 5000010

int n, d;
int f2[MAX_N], f3[MAX_N], f5[MAX_N];

int main() {

    freopen("pascal.in", "r", stdin);
    freopen("pascal.out", "w", stdout);

    scanf("%d %d", &n, &d);

    for (int i = 1; i <= n; i++) {
        if (i % 2 == 0) f2[i] = f2[i / 2] + 1;
        if (i % 3 == 0) f3[i] = f3[i / 3] + 1;
        if (i % 5 == 0) f5[i] = f5[i / 5] + 1;
    }

    int ans = 0, nr2 = 0, nr3 = 0, nr5 = 0;
    for (int i = 1; i <= n; i++) {
        int x = i, y = n - i + 1;

        nr2 = nr2 - f2[x] + f2[y];
        nr3 = nr3 - f3[x] + f3[y];
        nr5 = nr5 - f5[x] + f5[y];

        if (d == 2)
            ans = ans + (nr2 > 0);
        if (d == 3)
            ans = ans + (nr3 > 0);
        if (d == 4)
            ans = ans + (nr2 > 1);
        if (d == 5)
            ans = ans + (nr5 > 0);
        if (d == 6)
            ans = ans + (nr2 > 0 && nr3 > 0);
    }
    
    printf("%d\n", ans);    

    return 0;
}