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Overall Editorial

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A - Good morning

• Official Editorial by en_translator

B - Weekly Records

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C - Pizza

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D - Fill the Gaps

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• Proposer's Implementation by evima

E - Reversible

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• Proposer's Implementation by evima

F - Rotate and Palindrome

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• User Editorial by spheniscine

G - Index × A(Not Continuous ver.)

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H - Christmas Color Grid 1

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I - Earn to Advance

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• Another Solution by evima
• Similar problem (Codeforces) by spheniscine