import math
n,k = map(int,input().split())
count = 0
n = math.pow(2,n)
k = math.pow(2,k)
i=1
if k == 1:
    print(int(n))
else:
    while(1):
       if k*i <= n:
           count += 1
       else:
           break
       i+=1
       
    
    print(count)