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Overall Editorial

• Official 解説放送 by admin
• 4分でA-F by evima
• twitter上で行った簡易な解説 by kyopro_friends

A - Who Ate the Cake?

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

B - Piano 2

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

C - Bingo 2

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

D - Intersecting Intervals

• Official Editorial by sotanishy
• Official 解説放送 by editorial_admin
• User Editorial by kyopro_friends

E - Guess the Sum

• Official Editorial by toam
• Official 解説放送 by editorial_admin
• O(polyN) 解法 by Mitsubachi
• O(N) 解法 by Kiri8128

F - MST Query

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

G - Baseball

• Official Editorial by sotanishy