#include using namespace std; #define modulo 1000000007 #define mod(mod_x) ((((long long)mod_x+modulo))%modulo) #define Inf 100000000 int main(){ long long n; cin>>n; long long A = n; long long I = 0; while(n!=1){ if(n%2==0)n/=2; else n=n*3+1; I++; A = max(A,n); } cout<