Leetcode Problem 482. License Key Formatting
Leetcode Solutions
Right to Left Traversal
- Initialize a
StringBuilderor equivalent to build the result string. - Convert the input string to uppercase.
- Start iterating from the end of the string.
- Skip dashes in the input string.
- For alphanumeric characters, append them to the result string and increment a counter.
- If the counter reaches
k, append a dash to the result string and reset the counter. - After the loop, remove any leading dash if present.
- Reverse the result string to get the final reformatted license key.
Left to Right Traversal
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