题解 | #xxx定律#

#include<cstdio>
int main(){
    int n;
    while(scanf("%d",&n)!=EOF){
        int totalStep=0;
        while(n!=1){
            int isEven=n%2;//n是否是偶数
            if(0==isEven){
                n=n/2;
            }else{
                n=(3*n+1)/2;
            }
            ++totalStep;
        }
        printf("%d\n",totalStep);
    }
}