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70 | 70 | |170|[Two Sum III - Data structure design](https://leetcode.com/problems/two-sum-iii-data-structure-design/)|[Solution](../../blob/master/EASY/src/easy/TwoSumIIIDataStructureDesign.java)| O(n)|O(n)| Easy |
71 | 71 | |165|[Compare Version Numbers](https://leetcode.com/problems/compare-version-numbers/)|[Solution](../../blob/master/EASY/src/easy/CompareVersionNumbers.java)| O(n)|O(1)| Easy| |
72 | 72 | |162|[Find Peak Element](https://leetcode.com/problems/find-peak-element/)|[Solution](../../blob/master/MEDIUM/src/medium/FindPeakElement.java)| O(1)|O(logn)/O(n)| Binary Search| |
| 73 | +|161|[One Edit Distance](https://leetcode.com/problems/one-edit-distance/)|[Solution](../../blob/master/MEDIUM/src/medium/OneEditDistance.java)| O(n)|O(1)|| |
73 | 74 | |155|[Min Stack](https://leetcode.com/problems/min-stack/)|[Solution](../../blob/master/EASY/src/easy/MinStack.java)| O(1)|O(n) | Easy| Stack |
74 | 75 | |151|[Reverse Words in a String](https://leetcode.com/problems/reverse-words-in-a-string/)|[Solution](../../blob/master/MEDIUM/src/medium/ReverseWordsinaString.java)| O(n)|O(n)| Medium| |
75 | 76 | |140|[Word Break II](https://leetcode.com/problems/word-break-ii/)|[Solution](../../blob/master/HARD/src/hard/WordBreakII.java)| ? |O(n^2) | Hard| Backtracking/DFS |
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