# -*- coding: utf-8 -*-
"""
No.175 simpleDNA
https://yukicoder.me/problems/no/175

"""
import sys
from sys import stdin
input = stdin.readline


def main(args):
    L = int(input())
    N = int(input())
    print(2**(L-3) * N)


if __name__ == '__main__':
    main(sys.argv[1:])