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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 - First ABC

• Official Editorial by Nyaan
• Official Editorial by admin

B - Vacation Together

• Official Editorial by Nyaan
• Official Editorial by admin

C - Find it!

• Official Editorial by physics0523
• Official Editorial by admin
• より簡単な実装 by cirno3153

D - Grid Ice Floor

• Official Editorial by physics0523
• Official Editorial by admin
• 3乗解法 by kyopro_friends

E - Defect-free Squares

• Official Editorial by Nyaan
• Official Editorial by admin
• 二次元累積和と二分探索を用いた解法 by Shirotsume
• 二次元累積和を用いた二分探索を使わない解法 by nesya

F - Yet Another Grid Task

• Official Editorial by physics0523
• Official Editorial by admin
• User Editorial by kyopro_friends
• User Editorial by kanpurin

G - One More Grid Task

• Official Editorial by physics0523
• Official Editorial by admin
• User Editorial by yfuka86
• User Editorial by MMNMM

Ex - Many Illumination Plans

• Official Editorial by Nyaan
• Official Editorial by admin