2020

02-10 / Educational Codeforces Round 80
02-04 / Codeforces Round #616 (Div. 2)
01-29 / Educational Codeforces Round 79
01-23 / Codeforces Round #614 (Div. 2)
01-19 / 笛卡尔树
01-18 / 回文border理论
01-17 / Codeforces Hello 2020
01-17 / 浅谈贪心算法的拟阵理论
01-15 / Codeforces Round #612 (Div. 2)
01-14 / Codeforces Round #613 (Div. 2)