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Overall Editorial

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

A - The bottom of the ninth

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

B - Spot the Difference

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

C - Merge the balls

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

D - Grid and Magnet

• Official Editorial by mechanicalpenciI
• Official 解説放送 by editorial_admin
• Union-Find by shinchan

E - Jump Distance Sum

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

F - Double Sum

• Official Editorial by Nyaan
• Official 解説放送 by editorial_admin
• User Editorial by PCTprobability
• マージソートしながら求める方法 by hahho
• User Editorial by sounansya
• ちょっとした別解 by evima

G - Hash on Tree

• Official Editorial by Nyaan
• Official 解説放送 by editorial_admin
• 平方分割解 by shiomusubi496
• HLD 解 by Cyanmond
• Static Top Treeの最適な構築について by yosupo