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Overall Editorial

• Official 解説放送 by admin
• twitter上で行った簡易な解説 by kyopro_friends

A - Odd Position Sum

• Official Editorial by toam
• Official 解説放送 by editorial_admin

B - Four Hidden

• Official Editorial by sotanishy
• Official 解説放送 by editorial_admin

C - 403 Forbidden

• Official Editorial by sotanishy
• Official 解説放送 by editorial_admin

D - Forbidden Difference

• Official Editorial by sotanishy
• Official 解説放送 by editorial_admin

E - Forbidden Prefix

• Official Editorial by sotanishy
• Official 解説放送 by editorial_admin
• ローリングハッシュ by shobonvip
• std::multisetのみの解法 by QCFium
• User Editorial by kyopro_friends
• Trie木を使わない実装 by en_translator
• User Editorial by ngtkana

F - Shortest One Formula

• Official Editorial by toam
• Official 解説放送 by editorial_admin
• BNF に素直に従う解法 by KumaTachiRen
• 数式の長さがlogオーダーになることの略証 by kyopro_friends

G - Odd Position Sum Query

• Official Editorial by toam
• Official 解説放送 by editorial_admin
• （クエリに対しての）平方分割 by harurun4635
• User Editorial by t9unkubj