| # | Title | Solution |
|---|---|---|
| 1 | Two Sum | python, C++ |
| 2 | Add Two Numbers | python |
| 3 | Longest Substring Without Repeating Characters | python |
| 6 | ZigZag Conversion | python |
| 7 | Reverse Integer | python, C++ |
| 8 | String to Integer (atoi) | python |
| 9 | Palindrome Number | python, C# |
| 20 | Valid Parentheses | python |
| 50 | Pow(x, n) | python |
| 71 | Simplify Path | python |
| 165 | Compare Version Numbers | C++ |
| 227 | Basic Calculator II | python |
| 292 | Nim Game | python, C++, C# |
| 344 | Reverse String | python, C++, C# |
| 387 | First Unique Character in a String | python |
| 412 | Fizz Buzz | python, C++ |
| 441 | Arranging Coins | python |
| 442 | Find All Duplicates in an Array | python |
| 657 | Judge Route Circle | python |
| 754 | Reach a Number | python |
| 771 | Jewels and Stones | python |
| 794 | Valid Tic-Tac-Toe State | python |
| 804 | Unique Morse Code Words | python |