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LeetCode-电话号码的字母组合-Java

用了HashMap，效率还行，不过感觉有更优的解法。后边再考虑优化。 class Solution { public static List<String> letterCombinations(String digits) { if(digits.isEmpty())return ne...

17. 电话号码的字母组合 --力扣 --JAVA

题目给定一个仅包含数字 2-9 的字符串，返回所有它能表示的字母组合。答案可以按任意顺序返回。给出数字到字母的映射如下（与电话按键相同）。注意 1 不对应任何字母。解题思路将每个号码对应的内容用字符串存储起来，0和1对应空字符串；从下标0开始遍历digits,读取对应位置的按键，遍历...

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更新时间 2024-02-21 09:26:37

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