715 B | 715 chars
import sys
from math import sqrt, pi, sin, factorial, ceil, floor
from datetime import datetime, timedelta
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
memo = [-1] * 100000
def f(n):
global memo
if memo[n] >= 0:
return memo[n]
if n <= 1:
memo[n] = 1
return memo[n]
A = n
B = 1 + max(f(n // 2), f(n // 2 + n % 2))
memo[n] = min(A, B)
return memo[n]
def solve():
p(f(ii()))
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()