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• 02:16, 22 July 2025 Yiyj1 (talk | contribs) uploaded File:2009 IMO P4 (2).png (Diagram for solution 2 of 2009 IMO Problem 4)
• 02:02, 22 July 2025 Yiyj1 (talk | contribs) uploaded File:2009 IMO P4 (1).png (Diagram for solution 1 of 2009 IMO P4)
• 18:31, 26 December 2024 Yiyj1 (talk | contribs) uploaded a new version of File:AMC logo.png (Reverted to version as of 23:38, 25 December 2024 (EST) previous file too big)
• 17:08, 24 July 2020 User account Yiyj1 (talk | contribs) was created automatically