单项选择题
A. 3, 5, 7, 9, 12, 10, 15, 1 B. 3, 5, 9, 7, 12, 10, 15, 1 C. 3, 7, 5, 9, 12, 10, 15, 1 D. 3, 5, 7, 12, 9, 10, 15, 1
A. 1, 3, 5, 7, 9, 12 B. 1, 3, 5, 9, 7, 12 C. 1, 5, 3, 7, 9, 12 D. 1, 5, 3, 9, 12, 7
A. O(1) B. O(log2n) C. O(n2) D. O(nlog2n)