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Overall Editorial

• Official 解説放送 by admin
• 3分でA-E+G by evima
• twitter上で行った簡易な解説 by kyopro_friends

A - Buy a Pen

• Official Editorial by toam
• Official 解説放送 by editorial_admin
• 場合分けをしない実装 by rsk0315

B - Right Triangle

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

C - Sum = 0

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

D - Shortest Path 3

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

E - Count Arithmetic Subsequences

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

F - Perfect Matching on a Tree

• Official Editorial by sotanishy
• Official 解説放送 by editorial_admin
• 別解 by Mitsubachi
• User Editorial by MMNMM

G - Count Substring Query

• Official Editorial by toam
• Official 解説放送（Suffix Array解法） by editorial_admin
• Official 解説放送（Aho-Corasick解法） by editorial_admin
• Aho Corasick 法の利用 by maspy
• User Editorial by MMNMM