#include 
#include 
#include 
using namespace std;
 
int main()
{
    queue q;
    q.push(1);
    q.push(2);
    q.push(3);
    q.push(4);
    q.push(5);
    while(!q.empty()) {
        cout << q.front() << endl;
        q.pop();
    }
    return 0;
}