@victorsun: It is just a

RE: RE: [Question] Mathematics × Programming Competition #4 [問題] 數學 × 程式編寫比賽 (第四回)

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RE: [Question] Mathematics × Programming Competition #4 [問題] 數學 × 程式編寫比賽 (第四回)

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2017-08-07 03:13

It is just a exercise in textbook of Combinatorial Mathematics.

2017-08-07 03:13

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