/*
                                    ^....0
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                    ^^     010^   1 1                                   ^^^1110.1
                    0001  10 0   ^ 1.1                                   ^^^1111110
                    0^ 10 . 01   ^^  ^^                                   ^^^1111^1.^           ^^^
                    10  10^ 0^                                             ^^111^^^0.1^       1....^
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        1 1                                                                              0.
        ..                                                                              1 ^
        1                                                                               1
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    ^ 0                                                           1..01^^100000..0^
    1 1                                                            ^ 1 ^^1111^ ^^
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    ^ .                                                                 ^.1 00    01
    ^.0                                                                  001.     .^
    */
//#include <bits/stdc++.h>
#include <iostream>
#include <cstdio>
#include <cstring>
#include <cmath>
#include <algorithm>
#include <set>
#include <queue>
#include <map>
const int maxn = 1e6 + 7;
typedef long long ll;
using namespace std;
const ll mod = 998244353;
const long double pi = 3.1415926535897932384626433832795;
map<int, bool> mp;
queue<ll>q;
int main(){
    int n, k;
    cin >> n >> k;
    int num = 1;
    while (n --){
        if (2 * num <= num + k)
            num = 2 * num;
        else 
            num += k;
    }
    cout << num << endl;
    return 0;
}

Measured memory_bytes: 256