import sys
sys.setrecursionlimit(10000)

def knapsack(m, n):
    
    if n !=0:
        exp_n = (3*knapsack(m, n-1)+1) / 3
    
    elif n == 0:
        exp_n = m
    
    return exp_n

m, n = map(int, input().split())
print(knapsack(m, n))