// yukicoder: No.175 simpleDNA
// 2019.4.13 bal4u
// Union-set

#include <stdio.h>

//// 高速入力
#if 1
#define gc() getchar_unlocked()
#else
#define gc() getchar()
#endif
int in()    // 非負整数の入力
{
	int n = 0, c = gc();
	do n = 10 * n + (c & 0xf), c = gc(); while (c >= '0');
	return n;
}

int main()
{
	int L, N;

	L = in() - 3, N = in();
	printf("%d\n", N*(1 << L));
	return 0;
}