string s[MAXN]; int tot(0);
    while( cin >> s[tot] ) ++tot;
    int c = rand() % tot + 1;
    cout << "本期幸运牛友： @"<< s[c] << endl;
    cout << "牛币奖励已发放至账户，请注意查收~" << endl;
    cout << "-------------------------" << endl;
    cout << "每日话题已更新！" << endl;
    cout << "欢迎大家踊跃参与~~" << endl;
    cout << "传送门：" << endl;
    cout << "<a href=\"https://ac.nowcoder.com/discuss/253100\"><\\a>" << endl;