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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 - Weird Function

• Official Editorial by physics0523
• Official 解説放送 by editorial_admin

B - Longest Segment

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

C - Happy New Year!

• Official Editorial by physics0523
• Official 解説放送 by editorial_admin

D - Prefix K-th Max

• Official Editorial by penguinman
• Official 解説放送 by editorial_admin
• User Editorial by Forested
• User Editorial by rsk0315
• User Editorial by Mitsubachi
• User Editorial by kanpurin

E - Arithmetic Number

• Official Editorial by physics0523
• Official 解説放送 by editorial_admin

F - Reordering

• Official Editorial by penguinman
• Official 解説放送 by editorial_admin
• User Editorial by Kazu1998k
• User Editorial by Mitsubachi

G - Divide a Sequence

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

Ex - Enumerate Pairs

• Official Editorial by physics0523
• Official Editorial by physics0523
• Official 解説放送 by editorial_admin
• User Editorial by tatyam