#include <stdio.h>

int R, D, total[6];

int nr(int r, int d)
{
    int count = 0, i, aux;
    
    for (i = 1; i <= r/2; i++)
    {
        aux = r;
        while(aux)
        {
            total[2] += aux/2;
            aux /= 2;
        }
        aux = i;
        while(aux)
        {
            total[2] -= aux/2;
            aux /= 2;
        }
        aux = r-i;
        while(aux)
        {
            total[2] -= aux/2;
            aux /= 2;
        }
        aux = r;
        while(aux)
        {
            total[3] += aux/3;
            aux /= 3;
        }
        aux = i;
        while(aux)
        {
            total[3] -= aux/3;
            aux /= 3;
        }
        aux = r-i;
        while(aux)
        {
            total[3] -= aux/3;
            aux /= 3;
        }
        aux = r;
        while(aux)
        {
            total[5] += aux/5;
            aux /= 5;
        }
        aux = i;
        while(aux)
        {
            total[5] -= aux/5;
            aux /= 5;
        }
        aux = r-i;
        while(aux)
        {
            total[5] -= aux/5;
            aux /= 5;
        }
        if (d == 2)
            count += (total[2] > 0 ? 1 : 0);
        else if (d == 3)
            count += (total[3] > 0 ? 1 : 0);
        else if (d == 4)
            count += (total[2] >= 2 ? 1 : 0);
        else if (d == 5)
            count += (total[5] > 0 ? 1 : 0);
        else if (d == 6)
            count += (total[2] && total[3] ? 1 : 0);
    }
    count *= 2;
    if ((r/2)*2 == r)
    {
        if (d == 2)
            count -= (total[2] > 0 ? 1 : 0);
        else if (d == 3)
            count -= (total[3] > 0 ? 1 : 0);
        else if (d == 4)
            count -= (total[2] >= 2 ? 1 : 0);
        else if (d == 5)
            count -= (total[5] > 0 ? 1 : 0);
        else if (d == 6)
            count -= (total[2] && total[3] ? 1 : 0);
    }  
    
    return count;   
}

int main()
{
    FILE *in, *out;
    in = fopen("pascal.in", "r");
    out = fopen("pascal.out", "w");
    fscanf(in, "%d %d", &R, &D);

    fprintf(out, "%d\n", nr(R, D));
    fclose(in);
    fclose(out);
    return 0;   
}