N = int(input())
A = []
for n in range(5+1):
    a = pow(2,pow(2,n))+1
    flag = True
    for i in range(2,a+1):
        if i*i>a:break
        if a%i==0:
            flag = False
    if flag:
        A.append(a)
ans = 0
for m in range(31):
    x = pow(2,m)
    for i in range(1<<len(A)):
        cnt = 1
        for k in range(len(A)):
            if (i>>k)&1:
                cnt *= A[k]
        if x*cnt<=N:
            ans += 1
print(ans-2)