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- Proposed by mengmeng142857.3 KB (560 words) - 21:08, 15 December 2018
File:Solution to 2015 USAMO Problem 6.jpg This is a solution to 2015 USAMO Problem 6 proposed by mengmeng142857.(4,250 × 11,000 (1.39 MB)) - 21:22, 15 December 2018