#include<algorithm>
#include<iostream>
#include<stdio.h>
#include<string>
#include<vector>
#include <cmath>

using namespace std;
typedef long long ll;


int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);

    // input
    ll N,K;
    cin >> N >> K;
    ll Z = pow(2,N);
    ll X = pow(2,K);
    ll flag = 0;
    ll i = 1;

    vector<ll> in;

    while(flag <= Z){
        in.push_back(i*X);
        i++;
        flag = i*flag;
    }

    cout << in.size() << endl;

    return 0;
}