线段树标签

2020

03-13

Border 的四种求法[BJWC2018]

03-10

Educational Codeforces Round 83[CF1312]

03-02

Educational Codeforces Round 82[CF1303]

02-06

序列[CCPC Wannafly WC Day7]

01-02

party[bzoj5404]

2019

12-30

Exhausted[ARC076F]

12-29

圆桌会议[bzoj3693]

12-27