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Overall Editorial

• Official ヒント集 by maspy
• Official 解説放送 by admin

A - Union of Grid Paths

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

B - Greater Than Average

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

C - Removal of Multiples

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

D - Ancestor Relation

• Official Editorial by maspy
• Official 高速かつ楽な実装方針 by snuke
• Official 解説放送 by editorial_admin

E - Four Square Tiles

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