#include <algorithm>
#include <stdio.h>
#include <iostream>
#include <fstream>

#define MAX_N 5000010

using namespace std;

int divs[7] = {0, 0, 2, 3, 2, 5, 2};
int mapPrimeFact[7] = {-1, -1, 0, 1, 0, 2, 0};
int primeFact[3] = {2, 3, 5};
int n, d, apar, apar2;
char nPut[3][MAX_N];

int addMult(int x, int sign) {
    apar += sign * nPut[mapPrimeFact[d]][x];
    
    if (d == 6)
        apar2 += sign * nPut[1][x];
}

int main() {
    ifstream cin("pascal.in");
    freopen("pascal.out", "w", stdout);

    cin >> n >> d;
    for (int i = 1; i <= n; i++)
        for (int j = 0; j < 3; j++)
            if (i % primeFact[j] == 0)
                nPut[j][i] = nPut[j][i / primeFact[j]] + 1; 
    int sol = 0;
    for (int i = 1, j = n; j; i++, j--) {
        addMult(j, 1);
        addMult(i, -1);

        if (d == 4)
            sol += (apar > 1);
        else if (d == 6)
            sol += (apar && apar2);
        else sol += (bool) apar;
    }

    printf("%d\n", sol);

    return 0;
}