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24 August 2024
20:21 | 1967 IMO Problems/Problem 6 (diff | hist) . . (+975) . . Pf02 (talk | contribs) |
19:50 | 1988 IMO Problems/Problem 6 (diff | hist) . . (+49) . . Bobwang001 (talk | contribs) (Ph.D degree, IMO coach,https://www.youtube.com/@math000) |