Reformat Phone Number — LeetCode

Question:

LeetCode # 1694

Solution:

Solution

1. Clean the input
2. iterate while length is > 4, appending to blocks in groups of 3
3. if the length of the remaining string is ≤3, append it
4. if the length of the remaining string is anything else (i.e. 4), add in blocks of length 2.
5. Return blocks joined by ‘-’.

Source code here.

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