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#17624: 公式推導


hansen033 (HC)

d053. 10970 - Big Chocolate -- UVa 10970 | From: [1.161.21.105] | 發表日期: 2019-04-27 23:15

　m - 1 + (n - 1) * m

= a - 1 + ab - a

= ab - 1

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