4wa 2TLE 求助

#include<iostream>
using namespace std;
int main(){
    long long int n;
    cin>>n;
    for(int i=n;i!=1;){
        if(i%2!=0){
            cout<<i<<"*3+1="<<i*3+1<<endl;
            i=i*3+1;
        }else{
            cout<<i<<"/2="<<i/2<<endl;
            i=i/2;
        }
    }
    cout<<"end";
    return 0;
}