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Overall Editorial

• Official 出題一覧（解説放送を見たい場合はこちらのリンクをご利用ください） by kaede2020_admin

A - Good morning

• Official Editorial by mechanicalpenciI
• Official 解説放送 by editorial_admin
• User Editorial by Mitsubachi

B - Similar String

• Official Editorial by nok0
• Official Editorial by admin
• User Editorial by cirno3153

C - Playing Cards Validation

• Official Editorial by cn449
• Official Editorial by admin
• 正規表現を用いた解法 by HideN2000

D - Adjacency List

• Official Editorial by KoD
• Official Editorial by admin

E - 1 2 1 3 1 2 1

• Official Editorial by Nyaan
• User Editorial by Kazu1998k