#include <bits/stdc++.h> using namespace std; int ackmann(int a, int b) { if (a == 0) { return b + 1; } else if (b == 0) { return ackmann(a - 1, 1); } else { return ackmann(a - 1, ackmann(a, b - 1)); } } int main() { int x, y; cin >> x >> y; cout << ackmann(x, y); return 0; }