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Yangshun Tay
2019-07-15 02:25:49 -07:00
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contents/algorithms/permutation.md
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@@ -3,6 +3,8 @@ id: permutation
title: Permutation
---
## More questions
- You are given a 7 digit phone number, and you should find all possible letter combinations based on the digit-to-letter mapping on numeric pad and return only the ones that have valid match against a given dictionary of words.
- Give all possible letter combinations from a phone number.
- Generate all subsets of a string.