Master Sort Colors (LeetCode 75): Dutch National Flag 3-Way Partition | Day 5 of 180
2. Pattern Recognition: Why Dutch National Flag? In standard two-pointer partitioning (such as in QuickSort), you partition elements into two categories: smaller than pivot and greater than pivot. However, when a problem involves exactly three distinct categories (like 0, 1, 2, negative/zero/positive, or < pivot, == pivot, > pivot), a 2-way split requires multiple passes. … Read more