题解 | #魔法数字变换#

public class Main{
    public static void main(String[]args){
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int sum=0;
        int i = 0;
        while(a!=1){
            if(a%2 ==0){
                a = a/2;
            }
            else{
                a = a*3+1;
            }
            i++;
        }
        
        System.out.printf("%d\n",i);
        
    }//main
}//Main