#正常思路

```a = int(input())
def abc(x):
    b = []
    for i in range(1,x):
        if x%i ==0:
            b.append(i)
    c = 0
    for j in b:
        c += j
    if c == x:
        return True
    else:
        return False
d = 0
for k in range(1,a+1):
    if abc(k):
        d +=1
print(d)