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Overall Editorial

• Official Editorial by tokusakurai

A - Again Make UTPC

• Official Editorial by AngrySadEight
• 場合分けを避ける解法 by miscalculation53

B - Black or White 2

• Official Editorial by Mitsubachi
• User Editorial by miscalculation53

C - Contour Multiplication

• Official Editorial by nok0

D - DRD String

• Official 別解 by Mitsubachi
• Official Editorial by confeito

E - Equally Dividing

• Official Editorial by Mitsubachi

F - Flip or Not

• Official Editorial by torisasami
• Official 更に高速な解法 by Mitarushi

G - Graph Weighting

• Official 解説 by tokusakurai

H - Huge Segment Tree

• Official 別解 by Mitsubachi
• Official Editorial by SSRS
• Official 別解 by SSRS

I - I Love Marathon Contest

• Official 解説 by tokusakurai
• Official Editorial by noimi

J - Japanese Gift Money

• Official Editorial by miscalculation53
• Official 別解 by Mitsubachi

K - Kth Sum

• Official Editorial by SSRS
• User Editorial by snuke

L - Largest Triangle

• Official Editorial by confeito

M - Majority and Permutation

• Official 解説 by chinerist

N - Number of Abbreviations

• Official Editorial by Kite_kuma

O - Optimal Train Operation

• Official 解説 by tokusakurai
• Official 別解 by confeito

P - Priority Queue 3

• Official 解説 by tokusakurai

Q - Quotient Sum

• Official 解説 by tokusakurai