Blog of RuSun

$\begin{matrix} One Problem Is Difficult \\ Because You {Don}^{'} t Know \\ Why It Is Diffucult \end{matrix}$

差分约束标签

2022

04-14

CF1131D Gourmet choice

02-25

联合省选 2021 A卷

2021

11-18

P2474 [SCOI2008]天平

11-17

P2294 [HNOI2005]狡猾的商人

11-17

P3275 [SCOI2011]糖果