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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 - 1-2-4 Test

• Official Editorial by mechanicalpenciI
• Official Editorial by admin
• ユーザ解説 by drken

B - Hammer

• Official Editorial by kyopro_friends
• Official Editorial by admin

C - Simple path

• Official Editorial by mechanicalpenciI
• Official Editorial by admin

D - Stones

• Official Editorial by kyopro_friends
• Official Editorial by admin
• ユーザ解説 by drken

E - Apple Baskets on Circle

• Official Editorial by kyopro_friends
• Official Editorial by admin
• User Editorial by cirno3153

F - Transportation

• Official Editorial by mechanicalpenciI
• Official Editorial by admin

G - Sequence in mod P

• Official Editorial by kyopro_friends
• Official Editorial by admin
• User Editorial by maspy
• User Editorial by ryoryoryo111
• Baby-step Giant-stepの説明 by kanpurin

Ex - add 1

• Official Editorial by mechanicalpenciI
• Official Editorial by Nyaan
• Official 解説放送 by admin
• Official Editorial by admin
• User Editorial by maspy
• User Editorial by kyopro_friends