#include <iostream>
int steps,highest,number = 0;
long long n = 0;
int main(int argc, char **argv)
{
    for(int i = 999999; i > 1; i-=2){
        steps = 0;
        n = i;
        do{
            if(n % 2 == 0){
                n>>=1;
            }else{
                n = n*3+1;
            }
            steps++;
        }while(n != 1);
        if(steps > highest){
            highest = steps;
            number = i;
        }
    }
    std::cout<<number<<std::endl;
    return 0;
}