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Grokking the Coding Interview Patterns in C#

Find the Duplicate Number

Understand how to find the duplicate number in an array by applying the fast and slow pointers technique. This lesson guides you through analyzing the problem constraints and implementing a solution without modifying the array or using extra space, preparing you for efficient coding interviews.

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Statement

Given an array of positive numbers, nums, such that the values lie in the range [1,n][1, n], inclusive, and that there are n+1n+1 ...