A day of beating
T1：Biology
Sign-in questions, trie+lca
score: 100
T2：Blocks
I use two points? ? ?
Score: 0
Positive solution: AC using two monotonic stacks
T3: Funny
Violence does not open long long 20 minutes to fly
Score: 0
Positive solution: slope DP + two points / Li Chaoshu
T4: Card regular questions
I did not play
Score: 0
Positive solution: base ring tree + tree DP
AC
to sum up:
I’m so stupid, I can play and hang up every day
(not originally) 200+