#include <iostream>
// write your code here......
#include<vector>
using namespace std;
int main() {
// write your code here......
vector<int> v;
for(int i=0;i<5;i++)
{
int temp=0;
cin>>temp;
v.push_back(temp);
}
//正向迭代器
for(vector<int>::iterator it=v.begin();it!=v.end();it++)
{
cout<<*it<<" ";
}
cout<<endl;
//反向迭代器
for(vector<int>::reverse_iterator revit=v.rbegin();revit!=v.rend();revit++)
{
cout<<*revit<<" ";
}
return 0;
}