Move Zeroes

Category

Two Pointers

Checkbox

Difficulty

Easy

Index

Key Ideas

The key idea to solve the "Move Zeroes" problem is to use two pointers to keep track of the non-zero elements and move them to the beginning of the array while filling the rest with zeroes.

Problem Number

283

Problem Summary

The "Move Zeroes" problem (Problem Number: 283) is a problem in the LeetCode-75 curated list. The task is to move all the zeroes to the end of the given array while maintaining the relative order of the non-zero elements. A key pitfall to avoid is modifying the array structure, as the goal is to perform the operation in-place. Another pitfall is to ensure efficient implementation to achieve the required time complexity.

Solution Summary

To solve the "Move Zeroes" problem, we can use a two-pointer approach. We initialize two pointers, left and right, both starting from the beginning of the array. The left pointer keeps track of the position where the next non-zero element should be placed, while the right pointer traverses the array. Whenever the right pointer encounters a non-zero element, we swap it with the element at the left pointer and increment both pointers. This process ensures that all non-zero elements are moved to the left side of the array, while the remaining elements are automatically set to zero. By the end, all non-zero elements are in their correct positions, and the zeroes are at the end of the array.