答案

#include<iostream>
using namespace std;

int main(){
    long long a;
    cin>>a;
    while(1){
        if(a%2!=0){
            cout<<a<<"*3+1="<<a*3+1<<endl;
            a=a*3+1;
        }
        if(a%2==0){
            cout<<a<<"/2="<<a/2<<endl;
            a=a/2;
        }
        if(a==1){
            cout<<"End";
            break;
        }
    }
    return 0;
}

题解，直接复制粘贴