Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Output: ["ad", "ae", &q…
Given a string containing digits from 2-9inclusive, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Note that 1 does not map to any letters. E…
Letter Combinations of a Phone Number 问题简介: 给定包含2-9的数字的字符串,返回该数字可能表示的所有可能的字母组合. 下面给出了数字到字母的映射(就像在电话按钮上一样) 注意:1不会映射到任何字母 解法一: 先将所有数字与对应字符添加到map中,然后遍历给定字符串的每个字符(对应的一个数字),先添加给定字符串的第一个字符,例如’2’,那么集合list中就是{‘a’,‘b’,‘c’},然后再定义一个集合,容量变为之前list的容量*对应的字符数量(3或者是…
Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Note that 1 does not map to any letters.…
Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Note that 1 does not map to any letters.…
Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Notice Although the above answer is in lexicographical order, your answe…
