Contest Clarifications

admin | 2016-01-02 19:16:45Author

1002的数据保证每个点一定有出边 1002\'s test data guarantee that every point has at least one output edge

Maplesss | 2016-01-02 19:24:16# 1

那样例呢。。。

admin | 2016-01-02 19:25:51# 2

样例造的时候出了点偏差,对此对您表示歉意