n, k =map(int, input().split(' '))
z=0
time=0
num = 1
progress = 2
if k==1 and n==1:
    print(n)
elif k ==1:
    print(n-1)
elif k>=n:
    time+=1
    while num<n:
        num+=progress
        progress*=2
        time+=1
    print(time)
else:
    time+=1
    while z==0:
        if progress<=k and num<n:
            num+=progress
            progress*=2
            time+=1
        else:
            z+=1
    progress=k
    if num<n:
        while num<n:
            if num<n:
                time+=1
                num+=progress
    print(time)

Edited by author 16.04.2019 01:34