import bisect, itertools as it
F = [3, 5, 17, 257, 65537]
N = len(F)
A = int(raw_input())
enable = set([])

for i in xrange(30):
    for multi in it.product([0, 1], repeat = N):
        v = 2 ** i
        for j, bit in enumerate(multi):
            if bit:
                v *= F[j]
        if v > 2:
            enable.add(v)
            
enable = sorted(list(enable))
print bisect.bisect(enable, A)