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Overall Editorial

• Official 解説放送 A~E by admin
• Official 解説放送F~Ex by admin
• 前5問の動画による説明（1分54秒） by evima
• twitter上で行った簡易な解説 by kyopro_friends

A - Alternately

• Official Editorial by kyopro_friends
• Official Editorial by admin
• 別解 (サイト内解法 2) by Kazu1998k

B - Chessboard

• Official Editorial by kyopro_friends
• Official Editorial by admin

C - Gap Existence

• Official Editorial by kyopro_friends
• Official Editorial by admin
• ユーザ解説 by drken

D - M<=ab

• Official Editorial by mechanicalpenciI
• Official Editorial by admin
• ユーザ解説 by drken

E - Transition Game

• Official Editorial by mechanicalpenciI
• Official Editorial by admin
• ダブリングを使った実装方法 by shakayami
• 楽な実装方針 by evima

F - Simultaneous Swap

• Official Editorial by mechanicalpenciI
• Official Editorial by admin
• A を固定する方法 by Kiri8128
• より高速な解法 by MMNMM

G - Polygon and Points

• Official Editorial by kyopro_friends
• Official Editorial by admin
• User Editorial by rsk0315
• User Editorial by Nyaan

Ex - Unite

• Official Editorial by mechanicalpenciI
• Official Editorial by admin