import sys

def isPerfect(n):
    s=0
    for i in range(1, n):
        if n%i==0:
            s+=i
    if s==n:
        return True
    else:
        return False

for line in sys.stdin:
    m=int(line[:-1])
    count=0
    for i in range(1, m+1):
        if isPerfect(i):
            count+=1
    print(count)