17. Letter Combinations of a Phone Number
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[LeetCode - DiDi Labs 기출 문제] 17. Letter Combinations of a Phone Number
17. Letter Combinations of a Phone Number Medium Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. Return the answer in any order. A mapping of digits to letters (just like on the telephone buttons) is given below. Note that 1 does not map to any letters. Example 1: Input: digits = "23" Output: ["ad","ae","af","bd","be",..