1
/ \
2 3
/ \ / \
4 5 6 7 是一个小堆,编码为数组后为[1, 2, 3, 4, 5, 6, 7]。根据这一小堆定义,选出下面的是小堆的数组( )
1
/ \
2 3
/ \ / \
4 5 6 7[3, 5, 6, 9, 8, 20, 10, 12, 18, 9]
[3, 12, 10, 18, 9, 9, 20, 5, 6, 8]
[3, 6, 10, 12, 9, 9, 20, 5, 18, 8]
[3, 5, 9, 6, 8, 18, 10, 9, 20, 12]
[3, 18, 10, 12, 9, 9, 20, 5, 6, 8]
[3, 5, 9, 6, 18, 20, 10, 12, 8, 9]