标签：参考 str type 慢慢 gen not func 字符串 子集
Write a function to generate the generalized abbreviations of a word.
Example:
Given word = “word”, return the following list (order does not matter):
[“word”, “1ord”, “w1rd”, “wo1d”, “wor1”, “2rd”, “w2d”, “wo2”, “1o1d”, “1or1”, “w1r1”, “1o2”, “2r1”, “3d”, “w3”, “4”]
思路：递归+回溯
class Solution(object): def generateAbbreviations(self, word): """ :type word: str :rtype: List[str] """ res = [] #从0开始遍历，最后0用于计数 self.helper( 0, word, "", res, 0) return res def helper(self, index, word, temp_res, res, count): #注意这里是len(word)，不是len(word)-1 if index==len(word): if count!=0: #组合新的字符串 temp_res = temp_res[0:-count] + str(count) res.append( temp_res ) return # append 1 self.helper( index+1, word, temp_res+‘1‘, res, count+1) # append word if count!=0: temp_res = temp_res[0:-count] + str(count) self.helper( index+1, word, temp_res+word[index], res, 0) s=Solution() print(s.generateAbbreviations("word"))
只能看代码慢慢理解了。
参考：https://www.it610.com/article/5456538.htm
【python-子集】Generalized Abbreviation（广义缩写）
标签：参考 str type 慢慢 gen not func 字符串 子集
原文地址：https://www.cnblogs.com/xiximayou/p/12557176.html
