Search⌘ K
AI Features
Home
Courses
Grokking the Coding Interview Patterns in C++

Solution: Remove Element

Explore the two pointers technique to remove all instances of a given value from an integer array in place. Understand how to overwrite unwanted elements efficiently without extra memory. This lesson helps you implement a solution with linear time and constant space complexity by repositioning valid elements to the front.

We'll cover the following...

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 ...