import sys
sys.setrecursionlimit(100000000)
MOD = 10 ** 9 + 7
INF = 10 ** 15
dy = (-1,0,1,0)
dx = (0,1,0,-1)


def main():
    M,N = map(int,input().split())
    value = M
    for _ in range(N):
        next_value = 0
        next_value += value*2/3
        next_value += (value + 1)/3
        value = next_value
    print(value)
if __name__ == '__main__':
    main()