#include <iostream> using namespace std; int ackermann(int m, int n) { if (m == 0) { return n + 1; } else if (m > 0 && n == 0) { return ackermann(m - 1, 1); } else if (m > 0 && n > 0) { return ackermann(m - 1, ackermann(m, n - 1)); } } int main() { int m, n; cin >> m >> n; int result = ackermann(m, n); cout << result << endl; return 0; }