!/bin/python3

import math import os import random import re import sys

if name == 'main': n = int(input().strip()) arr = []

while n > 0:
    arr.append(n % 2)
    n = n // 2

# print(arr)
arr = arr[::-1]
# print(arr)

count = 0
max_count = 0
i = 0
while i < len(arr):
    if arr[i] == 0:            
        if count > max_count:
            max_count = count
        count = 0
    else:
        count += 1
        if count > max_count:
            max_count = count

    i += 1

print(max_count)