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@erugli Ah, thanks for cut the knot link! I cited Titu Andreescu and Bogdan Enescu from https://t.co/ZSeMN76s2J for… https://t.co/2xUaxNDnDZ
@erugli Ah, thanks for cut the knot link! I cited Titu Andreescu and Bogdan Enescu from https://t.co/ZSeMN76s2J for… https://t.co/2xUaxNDnDZ
Mathematical Olympiad Treasures by Titu Andreescu https://t.co/5pk9tmg9kH via @amazon