Provide summary of changes with issue number if any.
Solution - 1071
Checklist
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General
[x] This Pull Request is all my own work. (You'll be blacklisted if you are caught for plagiarism.)
[ ] I've explained my topic well with 2 - 3 LC problems and no external problems are used.
[ ] I've provided the full working solutions to the problems used in this tutorial.
[ ] I've provided suggested problems at the end with the given format. See here as an example. If the target solution is not available, leave solutionLink blank.
[ ] I've given credits / references if I use external resources. (For an image, give credit under it. Otherwise, add a new section called References at the end (after Suggested Problems).)
Change Summary
Provide summary of changes with issue number if any. Solution - 1071
Checklist
If you haven't fulfilled the below requirements or even delete the entire checklist, your PR won't be reviewed and will be closed without notice. Regular contributors (with 10+ PRs) can skip this part.
General
Tutorial
solutionLink
blank.Solutions
## Approach 1: Two Pointers
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