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Solution: Remove Element

Explore how to use the two-pointer technique to remove all instances of a specific value from an integer array in place. Understand the step-by-step process to overwrite unwanted elements without extra memory allocation, achieving efficient array modification and returning the count of valid elements.

Statement

You are given an integer array, nums, and an integer, val. Your task is to remove all occurrences of val from nums in place, meaning no additional memory allocation should be used. The relative order of the elements in the array may be changed. After modifying the array, return the number of elements that are not equal to val.

Let ...