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leetgo/phoneletters
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Jason Staten a92c066b09
phone number letters 		2 years ago
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phoneletters.go phone number letters 2 years ago
phoneletters_test.go phone number letters 2 years ago
readme.md phone number letters 2 years ago

readme.md

  1. 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","bf","cd","ce","cf"]

Example 2:

Input: digits = "" Output: []

Example 3:

Input: digits = "2" Output: ["a","b","c"]

Constraints:

0 <= digits.length <= 4
digits[i] is a digit in the range ['2', '9'].