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23 problems total
| Title | Difficulty | Videos | Companies |
|---|---|---|---|
| Longest Palindromic Substring | medium | ||
| Regular Expression Matching | hard | - | |
| Valid Parentheses | easy | ||
| Text Justification | hard | - | |
| Minimum Window Substring | hard | ||
| Fraction to Recurring Decimal | medium | - | |
| Design Add and Search Words Data Structure | medium | ||
| Word Search 2 - Return All Words | hard | ||
| Basic Calculator 2 Problem | medium | - | |
| Alien Dictionary | hard | ||
| Bulls and Cows | medium | - | |
| Palindrome Pairs | hard | - | |
| Mini Parser | medium | - | |
| Add Strings | easy | - | |
| Design In-Memory File System | hard | - | |
| IP to CIDR | medium | - | |
| Guess the Word | hard | - | |
| Verifying an Alien Dictionary | easy | - | |
| Robot Bounded In Circle | medium | - | |
| Minimize Rounding Error to Meet Target | medium | - | |
| Design File System | medium | - | |
| Maximum Profit in Job Scheduling | hard | - | |
| Smallest Common Region | medium | - |