#include <cstdio>

const int MAX_N = 5000000;
struct codeFactory {
  int e2, e3, e5;
} prec[1+MAX_N], fi, fj, fij, rez;

int main() {
  int r, d, nr;
  FILE *fin = fopen("pascal.in", "r");
  fscanf(fin, "%d%d", &r, &d);
  fclose(fin);

  for(int i = 1; i <= r; ++i) {
    int c = i;
    prec[i] = prec[i - 1];
    while(c % 2 == 0) {
      prec[i].e2++;
      c = c / 2;
    }
    while(c % 3 == 0) {
      prec[i].e3++;
      c = c / 3;
    }
    while(c % 5 == 0) {
      prec[i].e5++;
      c = c / 5;
    }
  }

  fi = prec[r];
  nr = 0;
  for(int j = 0; j <= r; ++j) {
    fj = prec[j];
    fij = prec[r - j];
    rez.e2 = fi.e2 - fj.e2 - fij.e2;
    rez.e3 = fi.e3 - fj.e3 - fij.e3;
    rez.e5 = fi.e5 - fj.e5 - fij.e5;
    if(d == 2 && rez.e2 > 0)
      ++nr;
    else if(d == 3 && rez.e3 > 0)
      ++nr;
    else if(d == 4 && rez.e2 > 1)
      ++nr;
    else if(d == 5 && rez.e5 > 0)
      ++nr;
    else if(d == 6 && rez.e2 > 0 && rez.e3 > 0)
      ++nr;
  }

  FILE *fout = fopen("pascal.out", "w");
  fprintf(fout, "%d", nr);
  fclose(fout);
  return 0;
}