10 posts in total.

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2022

CF 1661D Progressions Covering(差分+线段树) 04-12 CF 1661C Water the Trees(思维) 04-12 CF 1665C Tree Infection(模拟 + 贪心) 04-09 CF 1656D K-good(思维) 03-25 CF 1654E Arithmetic Operations(枚举) 03-21 CF 1654C Alice and the Cake(模拟) 03-21 Codeforces Round 770 (Div.2) B.Fortune Telling 02-07 Codeforces Round 770 (Div.2) C.OKEA 02-07

2021

Palindromic Matrix 05-17 CF1118D2 Coffee and Coursework (Hard Version)(二分) 05-17