#include <iostream>
using namespace std;

int main() {
	int c, n;
	cin>>c;
	cin>>n;
	for(int i=1;i<=n;++i) {
		if(c%2) {
			c=3*c+1;
		} else {
			c=c/2;
		}
	}
	cout<<c<<endl;
	return 0;
}