package main

import (
	"fmt"
	"math"
)

func main() {
	var n, k, ans int
	fmt.Scan(&n, &k)
	l, d := int(math.Pow(2, float64(n))), int(math.Pow(2, float64(k)))
	for i := 1; i <= l; i++ {
		if d*i > l {
			break
		}
		ans++
	}
	fmt.Println(ans)
}