文件目录

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int a, n;
    while (cin >> a >> n)
    {
        int blah[1000050] = {};
        int k, k1, k2;
        k = k1 = k2 = 1;
        blah[k] = a;
        while (true)
        {
            int b1 = 2 * blah[k1] + 1, b2 = 3 * blah[k2] + 1;
            if (b1 < b2)
            {
                blah[++k] = b1;
                k1++;
            }
            else if (b1 > b2)
            {
                blah[++k] = b2;
                k2++;
            }
            else
            {
                blah[++k] = b1;
                k1++;
                k2++;
            }
            if (blah[n] != 0)
            {
                cout << blah[n] << endl;
                break;
            }
        }
    }
    return 0;
}