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Grokking the Coding Interview Patterns

Sort Colors

Explore how to apply the two pointers technique to sort an array containing 0s, 1s, and 2s representing colors. Understand problem constraints and implement an in-place solution aimed at efficient time and space usage.

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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:

  • ...