In the “Subarray Sum Equals K” problem, you are given an array of integers and a target integer, k. The goal is to find the number of contiguous subarrays within the array that sum up to k. Think of it as searching for specific sections in the array where adding…

The LeetCode problem “Longest Common Prefix” requires finding the longest common starting sequence (prefix) among an array of strings. For example, given [“flower”, “flow” “flight”], the longest common prefix is “fl”. Algorithm and Data Structure Choice Chosen Algorithm: Vertical Scanning The vertical scanning technique checks each character position across all…

The LeetCode problem “Meeting Rooms II” requires us to determine the minimum number of meeting rooms needed to accommodate a set of meetings with a given start and end times. For example, if we have meetings scheduled from (0, 30), (5, 10), and (15, 20), we need two meeting rooms…

To solve the LeetCode problem “Trapping Rain Water”, we’re given an array representing an elevation map, where each element’s value is the height of that point. The goal is to calculate how much water can be trapped between the bars after it rains. Think of each bar as a wall,…

To solve the Compare Version Numbers problem, we need to compare version strings like “1.0.0 and “1.0.1”. Each string is split by . to represent levels of the version, such as major.minor.patch. Our task is to compare these levels and determine which version is larger or if they are equal….