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DIY: Random Pick Index

Explore how to implement a memory-efficient method to randomly select an index of a given target number in an array containing duplicates. This lesson helps you understand practical techniques useful in coding interviews, focusing on problem-solving approaches that handle large datasets while ensuring randomness.

Problem statement

In this challenge, you are given an array of integers with possible duplicate values. Your task is to output a randomly picked index of a given target number present in the array. The solution ...