题目1518：反转链表

#include <iostream>
#include <fstream>
#include <list>

using namespace std;

int main()
{
    int n;

    #ifndef ONLINE_JUDGE
        ifstream cin("d:\\OJ\\uva_in.txt");
    #endif // ONLINE_JUDGE

    while (cin >> n) {
        list<int> l;
        int num;

        for (int i = 0; i < n; i++) {
            cin >> num;
            l.push_back(num);
        }

        if (n == 0) cout << "NULL" << endl;
        else {
            for (list<int>::reverse_iterator it = l.rbegin(); it != l.rend(); it++) {
                if (it != l.rbegin()) {
                    cout << " ";
                }
                cout << *it ;
            }
            cout << endl;
        }
    }
    return 0;
}