"""
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)
 
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