Letter Combinations of a Phone Number

#grind75 #grind75-week7 #leetcode #leetcode-30min #leetcode-medium #recursion

July 02, 1970

Prerequisites

To understand this note, these notes may help:

Grind75, a better Blind75 you can customize
- Leetcode discussion on Blind75 LeetCode questions
  - Memorising Leetcode by using Anki as a Scheduler

Grind75 week 7, problem 2.

This problem is medium, and is expected to take 30 mins.

https://leetcode.com/problems/letter-combinations-of-a-phone-number