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27 problems total
| Title | Difficulty | Videos | Companies |
|---|---|---|---|
| Longest Substring Without Repeating Characters | medium | ||
| Regular Expression Matching | hard | - | |
| Generate Parentheses | medium | - | |
| Wildcard Matching | hard | - | |
| Simplify Path | medium | - | |
| Edit Distance | medium | - | |
| Minimum Window Substring | hard | ||
| Word Search 1 - Find if word exists | medium | ||
| Word Break 1 - Check if word is breakable | medium | ||
| Largest Number From Given Numbers | medium | ||
| Word Search 2 - Return All Words | hard | ||
| Expression Add Operators | hard | - | |
| Remove Duplicate Letters | medium | - | |
| Generalized Abbreviation | medium | - | |
| Decode String | medium | - | |
| Longest Substring with At Least K Repeating Characters | medium | - | |
| Remove K Digits | medium | - | |
| Add Strings | easy | - | |
| Serialize and Deserialize Binary Search Tree BST | medium | - | |
| Next Closest Time | medium | - | |
| Number of Atoms | hard | - | |
| Basic Calculator 3 | hard | - | |
| Swap Adjacent in LR String | medium | - | |
| Score of Parentheses | medium | - | |
| Longest Common Subsequence LCS 1 - Get Length | medium | ||
| Maximum Profit in Job Scheduling | hard | - | |
| Minimum Remove to Make Valid Parentheses | medium | - |