未完成-PAT甲级练习1066. Root of AVL Tree (25)
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1066. Root of AVL Tree (25)
An AVL tree is a self-balancing binary search tree. In an AVL tree, the heights of the two child subtrees of any node differ by at most one; if at any time they differ by more than one, rebalancing is done to restore this property. Figures 1-4 illustrate the rotation rules.
Now given a sequence of insertions, you are supposed to tell the root of the resulting AVL tree.
Input Specification:
Each input file contains one test case. For each case, the first line contains a positive integer N (<=20) which is the total number of keys to be inserted. Then N distinct integer keys are given in the next line. All the numbers in a line are separated by a space.
Output Specification:
For each test case, print ythe root of the resulting AVL tree in one line.
Sample Input 1:588 70 61 96 120Sample Output 1:
70Sample Input 2:
788 70 61 96 120 90 65Sample Output 2:
88
贴上别人的代码http://blog.csdn.net/jtjy568805874/article/details/53609945
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