2017-11-29 ACM codeforces gym 101612 K [Kotlin Island] (ICPC 2017-2018 NEERC Northern Subregional Contest St Petersburg November 4 2017) 题解
2017-11-29 ACM codeforces gym 101612 C [Consonant Fencity] (ICPC 2017-2018 NEERC Northern Subregional Contest St Petersburg November 4 2017) 题解