Kicking Off: The First Day of the Grind

💻 Problems Solved:✅ Contains Duplicate (Easy)✅ Valid Anagram (Easy)✅ Two Sum (Easy)✅ Group Anagrams (Medium) 🔍 Key Takeaways: Hashing is powerful! Used HashMaps (or Sets) for quick lookups in most problems. Sorting can simplify things. In "Valid ...