题目描述

不会

样例

#include <iostream>

using namespace std;

int main()
{
    string s[200];

    int n;
    while (cin >> n, n)
    {
        int len = 300;
        for (int i = 0; i < n; i ++ )
        {
            cin >> s[i];
            if (s[i].size() < len) len = s[i].size();
        }

        while (len)
        {
            bool is_hz = true;
            for (int i = 1; i < n; i ++ )
            {
                bool is_same = true;
                for (int j = 1; j <= len; j ++ )
                {
                    if (s[0][s[0].size() - j] != s[i][s[i].size() - j])
                    {
                        is_same = false;
                        break;
                    }
                }

                if (!is_same) 
                {
                    is_hz = false;
                    break;
                }
            }

            if (is_hz) break;

            len -- ;
        }

        cout << s[0].substr(s[0].size() - len) << endl;
    }

    return 0;
}