package main

import (
	"fmt"
	"math"
)

var (
	L int
	N int
	S []string
)

func resolve() int {
	ret := int(math.Exp2(float64(L-3))) * N
	return ret
}

func main() {
	fmt.Scanf("%d\n%d\n", &L, &N)
	S = make([]string, N)
	for i := 0; i < N; i++ {
		fmt.Scanf("%s", S[i])
	}
	fmt.Scanf("\n")
	fmt.Println(resolve())
}