#include using namespace std; using ll=long long; #define rep2(i, a, n) for(int i = (a); i < (n); i++) #define rep(i, n) rep2(i,0,n) int main(){ cin.tie(nullptr);ios_base::sync_with_stdio(false); ll n;cin>>n; ll maxv=n,i=0; while(n!=1){ i++; if(n%2==0)n/=2; else n=3*n+1; if(n>maxv){ maxv=n; } } cout<