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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 - Takahashi san 2

• Official Editorial by mechanicalpenciI
• Official 解説放送 by editorial_admin
• User Editorial by blueberry1001

B - Unvarnished Report

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

C - Separated Lunch

• Official Editorial by mechanicalpenciI
• Official 解説放送 by editorial_admin
• 再帰関数による実装 by blueberry1001
• ユーザ解説 by drken

D - Laser Marking

• Official Editorial by physics0523
• Official 解説放送 by editorial_admin
• 計算量の改善 by potato167
• ユーザ解説 by drken

E - Sensor Optimization Dilemma 2

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

F - Shipping

• Official Editorial by physics0523
• Official 解説放送 by editorial_admin
• 計算量の改善 by potato167
• $O(N^2)$ 時間解法 by suisen

G - Only One Product Name

• Official Editorial by mechanicalpenciI
• Official 解説放送 by editorial_admin
• User Editorial by noshi91