n, k = [int(x) for x in input().split()]

sie = [0] * (n + 1)
for num in (2, 3):
    for i in range(num, n + 1, num):
        sie[i] += 1
for num in range(6, n + 1, 6):
    for snum in (num - 1, num + 1):
        if sie[snum] != 0:
            continue
        for i in range(snum, n + 1, snum):
            sie[i] += 1
res = 0
for c in sie:
    if c >= k:
        res += 1

print(res)