[Codeforces Round #447][Codeforces 894E]Ralph and Mushrooms

[Codeforces Round #445][Codeforces 886D]Restoration of string

[Codeforces Round #445][Codeforces 886E]Maximum Element

[Codeforces Round #445][Codeforces 886C]Petya and Catacombs

[Educational Codeforces Round 32][Codeforces 888E]Maximum Subsequence

[2017-2018 ACM-ICPC, NEERC, Southern Subregional Contest][Codeforces 883 M]Quadcopter Competition

[2017-2018 ACM-ICPC, NEERC, Southern Subregional Contest][Codeforces 883 G]Orientation of Edges

[2017-2018 ACM-ICPC, NEERC, Southern Subregional Contest][Codeforces 883 F]Lost in Transliteration

[2017-2018 ACM-ICPC, NEERC, Southern Subregional Contest][Codeforces 883 E]Field of Wonders

[MemSQL Start[c]UP 3.0 - Round 1][Codeforces 859]E. Desk Disorder