ACM集訓之專題五： 構造共軛函數+矩陣快速冪 HDU 4565

題目 http://acm.hdu.edu.cn/showproblem.php?pid=4565 HDU 4565 A sequence S n is defined as: Where a, b, n, m are positive integers.┌x┐is the ceil of x. For example, ┌3.14┐=4. You are to calculate S n. 　　

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