"""
author @ Mobarak Hosen Shakil
Dept. of ICE, Islamic University
Kushtia, Bangladesh

File Name: BinarySearch.py
Created on: 3:08 PM, 18 - 02 - 2019 

"""


N, X = map(int, input().split())
lo = int(1)
hi = int(N)

cnt = 0

while lo < hi:
    mid = int((lo + hi) / 2)
    cnt += 1
    if X > mid:
        lo = mid + 1
    else:
        hi = mid
print(cnt)