Category: Java programming question
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Sort a List in Ascending Order
Approach 1: Using Stream.sorted() Why it works: Approach 2: Using Comparator.naturalOrder() (Alternative) Why it works:
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Java Stream program to find all even numbers from a list
Approach 1 Approach 2 Using Collectors.partitioningBy() – To classify into even and odd Approach 3
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Leftmost Column with at Least a One
Problem Statement You are given a binary matrix (only 0s and 1s) binaryMatrix where: You can access the matrix only through an API: Goal: Minimize the number of get() calls. Example Key Observations Approach: Top-Right Pointer Java Code Dry Run Example Input Matrix Return: 1
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Search in Rotated Sorted Array
1. Problem Statement You are given an integer array nums that was originally sorted in ascending order, but then rotated at some pivot. For example: Given the rotated array nums and an integer target, return the index of target if it is in nums. Otherwise, return -1. 1.1 Constraints: 1.2 Example 2. Intuition Even though…
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Minimum Path Sum
Problem Statement You are given an m x n grid filled with non-negative integers, representing the cost to travel through each cell. You can only move right or down at any point in time. Return the minimum sum of the path from the top-left corner (0, 0) to the bottom-right corner (m-1, n-1). Example Key…
