Letter Combinations of a Phone Number at DE Shaw
Medium65.5% acceptance
This problem has 75.0% frequency at DE Shaw.
Problem Description
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. ![](https...
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