An Optimal Algorithm for Prufer Codes
An Optimal Algorithm for Prufer Codes
复制标题
Prufer码的优化算法
DOI:
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发表时间:
2009
期刊:
影响因子:
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通讯作者:
Yingjie Wu
中科院分区:
文献类型:
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作者:
Xiaodong Wang;Lei Wang;Yingjie Wu
This paper studies the algorithms for coding and decoding Prufer codes of a labeled tree. The algorithms for coding and decoding Prufer codes of a labeled tree in the literatures require time usually. Although there exist linear time algorithms for Prufer-like codes [1,2,3], the algorithms utilize the integer sorting algorithms. The special range of the integers to be sorted is utilized to obtain a linear time integer sorting algorithm. The Prufer code problem is reduced to integer sorting. In this paper we consider the Prufer code problem in a different angle and a more direct manner. We start from a naive algorithm, then improved it gradually and finally we obtain a very practical linear time algorithm. The techniques we used in this paper are of interest in their own right.