| 203 | Remove Linked List Elements | Easy |
| 224 | Basic Calculator | Hard |
| 231 | Power of Two | Easy |
| 233 | Number of Digit One | Hard |
| 241 | Different Ways to Add Parentheses | Medium |
| 273 | Integer to English Words | Hard |
| 326 | Power of Three | Easy |
| 342 | Power of Four | Easy |
| 344 | Reverse String | Easy |
| 390 | Elimination Game | Medium |
| 394 | Decode String | Medium |
| 486 | Predict the Winner | Medium |
| 509 | Fibonacci Number | Easy |
| 736 | Parse Lisp Expression | Hard |
| 761 | Special Binary String | Hard |
| 770 | Basic Calculator IV | Hard |
| 894 | All Possible Full Binary Trees | Medium |
| 1106 | Parsing A Boolean Expression | Hard |
| 1545 | Find Kth Bit in Nth Binary String | Medium |
| 1808 | Maximize Number of Nice Divisors | Hard |
| 1823 | Find the Winner of the Circular Game | Medium |
| 1922 | Count Good Numbers | Medium |
| 1969 | Minimum Non-Zero Product of the Array Elements | Medium |
| 2212 | Maximum Points in an Archery Competition | Medium |
| 2487 | Remove Nodes From Linked List | Medium |
| 2550 | Count Collisions of Monkeys on a Polygon | Medium |