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ghfsh
- 1由先序序列确定根节点(即第一个字母) 2按根节点把中序序列分为两段,前面是左子树,后面的是右子树 后面的步骤就基本是前面两步的重复*/ -1 determined by the sequence of the first order root (ie the first letter) 2 sequence at the root node in the sequence to be divided into two sections, in front of the left s