2019 icpc nanchagn invitation 题解
D. Match Stick Game
https://blog.csdn.net/weixin_38686780/article/details/89459343
I. Max answer
https://blog.csdn.net/weixin_38686780/article/details/89457254
J Distance on the tree
https://blog.csdn.net/weixin_38686780/article/details/89442893
E card Game
https://blog.csdn.net/weixin_38686780/article/details/89421559
得走出这种状态，不能一直困在那里面，哪不行就去提升哪，你一动不动那指定改变不了未来，动起来，积少成多才能越来越好