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来自「浙江大学计算机学院数据结构课程的教学课件」· HTM 代码 · 共 38 行
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<b><font face="Arial, Helvetica, sans-serif" size="4" color="#000000">
【<font color="#0033CC">definition</font>】A tree is a finite set of one or more nodes such that
(1) There is a specially designated node called the root
(2) The remaining nodes are partitioned into n >= 0 disjoint set
<i>T 1, ... , T n , </i>where each of these sets is a tree. We call
<i> T 1, ... , T n</i> the subtrees of the root
<img src="IMAGE/text5-a1.gif" width="314" height="199">
<i><font color="#FF0000">
degree of a node</font></i> --- the number of subtree of the node
<i><font color="#FF0000">degree of a tree </font></i> --- the maximum degree of the nodes in the tree
<i><font color="#FF0000">leaf</font></i> (terminal node ) --- a node with degree zero
<i><font color="#FF0000">parent children sibling ancestors descendants
level high depth
</font></i></font></b></pre>
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