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Grokking the Coding Interview Patterns in C#

Sort Colors

Explore how to solve the Sort Colors problem by mastering the two-pointer approach. Learn to reorder arrays containing 0s, 1s, and 2s in place, developing efficiency and understanding key coding interview patterns.

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Statement

Given an array, colors, which contains a combination of the following three elements:

  • 0 (Representing red)

  • 1 (Representing white)

  • 2 (Representing blue)

Sort the array in place so that the elements of the same color are adjacent, and the final order is: red (0), then white (1), and then blue (2).

Note: You are not allowed to use any built-in sorting functions. The goal is to solve this efficiently without extra space.

Constraints:

  • ...