Problem-solving patterns, also known as problem-solving techniques or strategies, are systematic approaches that can help you tackle coding and algorithmic challenges more effectively. Here are some problem-solving patterns commonly used in coding: (1). Two Pointers Use two pointers that traverse the data structure from different directions to solve problems efficiently. This is common in problems … Read more
Problem Description: Given an integer array nums, move all 0‘s to the end of it while maintaining the relative order of the non-zero elements. Example 1: Example 2: Constraints: Move Zeroes – LeetCode Solution(s): To move all zeros to the end of an integer array while maintaining the relative order of the non-zero elements, you can follow … Read more
Problem Description: Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it can trap after raining. Example 1 : Example 2: Constraints: Problem Link :Trapping Rain Water – LeetCode Solution(s): Approach 1: Brute Force Solution Java Code: Explanation: 1.Initialization: 2.Main Loop: 3.Finding Maximum Height to the Left: … Read more
Merging sorted arrays is a fundamental problem in computer science. The task is to combine two sorted arrays into one sorted array, maintaining the order. The Merge Sorted Array presents this classic problem with a twist — you are asked to merge the arrays in-place. This means that instead of using extra space, you must … Read more
Problem Description: Given an integer array nums, rotate the array to the right by k steps, where k is non-negative. Example 1: Example 2: Constraints: Problem Link : Rotate Array – LeetCode Solution(s): Approach 1: Using temporary array Java Code: Complexity: Approach 2 : In-Place Java Code : Complexity:
Given an integer array nums and an integer val, remove all occurrences of val in nums in-place. The order of the elements may be changed. Then return the number of elements in nums which are not equal to val. Consider the number of elements in nums which are not equal to val be k, to get accepted, you need to do the following things: Custom Judge: The judge will test your … Read more