23 遞迴式:若n>1 時,T(n)= 2T(n/2)+2n,且T(1)=20,其解為:
(A)T(n)= O(n)
(B)T(n)= O(n2)
(C)T(n)= O(n log n)
(D)T(n)= O(log(log n))
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統計: A(5), B(6), C(32), D(1), E(0) #924091
統計: A(5), B(6), C(32), D(1), E(0) #924091