因为最近在复习期末考，所以就不发比赛相关的博客。但是考完之后还是要补题的。
这里把期末考结束前的坑列出来，划掉就是已经填上的：
Codeforces Global Round 3
Codeforces Round #564 (Div. 2) (2019.07.13)
Codeforces Round #565 (Div. 3) (2019.07.14)
Codeforces Round #566 (Div. 2) (2019.07.14)
Codeforces Round #567 (Div. 2) (2019.07.16)
Codeforces Round #568 (Div. 2) (2019.07.17)
Codeforces Round #569 (Div. 2)
Codeforces Round #570 (Div. 3) (2019.07.16)
Codeforces Round #571 (Div. 2)
Educational Codeforces Round 67 (Rated for Div. 2) (2019.07.15)
Educational Codeforces Round 68 (Rated for Div. 2) (2019.07.15)
Codeforces Round #572 (Div. 2)
Codeforces Round #573 (Div. 2)
Comet OJ Contest #5 (2019.07.13)
Comet OJ Contest #6
Comet OJ Contest #7
还有一些想写的数据结构相关博客：
划分树
树链剖分
splay树
动态树
zkw线段树
主席树
treap
kd树
树套树