/*
T523714
#include<bits/stdc++.h>
using namespace std;
double p,u,o,r,q;
int y,x,m,t,n;
int main(){
	cin>>p>>u>>o>>r>>q;
	cin>>n>>y>>x>>m>>t;
	if(p<=u) cout<<10<<endl;
	else if(p<=o) cout<<20<<endl;
	else if(p<=r) cout<<30<<endl;
	else if(p>=q)cout<<100<<endl;
	else if(p>r && p<q) cout<<99<<endl;
	int op=n/y;
	int ui=n/x;
	int up=n/m;
	int uy=n/t;
	cout<<op<<' '<<ui<<' '<<up<<' '<<uy;
}*/
#include<bits/stdc++.h>
using namespace std;
int n,ans,a[1000];
int main(){
	scanf("%d",&n);
	for(int i=1;i;i++){
		ans=n;
		if(n%2==0){
			a[i]=ans/2;
		}
		else if(n%2!=0){
			a[i]=ans*3+1;
		}
		else if(ans==1){
			break;
		}
	}
	for(int i=n;i>=1;i--){
		cout<<a[i];
	}
}