## Easy

- https://leetcode.com/problems/basic-calculator/description/
- https://leetcode.com/problems/mini-parser/description/

## Medium

- https://leetcode.com/problems/evaluate-reverse-polish-notation/description/
- https://leetcode.com/problems/ternary-expression-parser/description/
- https://leetcode.com/problems/remove-comments/description/
- https://leetcode.com/problems/encode-and-decode-strings/description/
- https://leetcode.com/problems/serialize-and-deserialize-binary-tree/description/
- https://leetcode.com/problems/construct-binary-tree-from-string/description/
- https://leetcode.com/problems/basic-calculator-ii/description/
- https://leetcode.com/problems/add-bold-tag-in-string/description/
- https://leetcode.com/problems/decode-string/description/

## Hard

- https://leetcode.com/problems/parse-lisp-expression/description/
- https://leetcode.com/problems/number-of-atoms/description/
- https://leetcode.com/problems/tag-validator/description/