| # | Title | Solution | Difficulty |
|---|---|---|---|
| 1 | two-sum | java | Easy |
| 2 | add-two-numbers | java | Medium |
| 3 | longest-substring-without-repeating-characters | java | Medium |
| 4 | median-of-two-sorted-arrays | java | Hard |
| 5 | longest-palindromic-substring | java | Hard |
| 7 | reverse-integer | java | Easy |
| 9 | palindrome-number | java | Easy |
| 10 | regular-expression-matching | java | hard |
| 11 | container-with-most-water | java | Medium |
| 12 | integer-to-roman | java | Medium |
| 13 | roman-to-integer | java | Easy |
| 25 | reverse-nodes-in-k-group | java | Hard |
hcghaha/algorithms-learning
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