705 B | 705 chars
import sys
from math import sqrt, pi, sin, factorial, ceil, floor
from decimal import Decimal
BLANK = " "
inp = input
# inp = lambda : sys.stdin.readline()[:-1].strip()
mii = lambda x = BLANK : [*map(int,inp().split(x))]
mfi = lambda x = BLANK : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def solve():
n = ii()
a = []
b = []
i = 2
while i <= n:
a.append(i)
i *= 2
i = 1
while i <= n:
b.append(i)
i *= 3
cnt = 0
for i in a:
for j in b:
if i * j <= n:
cnt += 1
else:
continue
p(cnt)
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()