[GCJKickstart2018RoundB] A. No Nine

10-18

[GCJKickstart2018RoundA] B. Lucky Dip

10-18

[GCJKickstart2018RoundA] A. Even Digits

10-18

[Nowcoder199A] 分组(dfs，拉姆齐定理, 随机)

10-07

[Nowcoder208A] Birthday(最小费用最大流)

10-06

[Nowcoder190H] CSL的校园卡

09-15

[Nowcoder180D] xor序列 (线性基)

09-08

[Codeforces1029E] Tree with Small Distances (贪心)

08-27

[HDOJ6425] Rikka with Badminton (组合数学)

08-20

[HDOJ6418] Rikka with Stone-Paper-Scissors (纳什均衡)

08-20