Jul 17, 2025 · 3 min read · Problem Statement LeetCode 560. Subarray Sum Equals K Given an integer array nums and an integer k, return the total number of continuous subarrays whose sum is equal to k. Example: Input: nums = [1,1,1], k = 2 Output: 2 (subarrays [1,1] at indice...
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Apr 13, 2025 · 4 min read · 🗃️ FileNest – Your Organized File Companion FileNest is a lightweight desktop-based file management application developed in Java, designed to simplify the way users store, access, and organize their files. Inspired by real-world file systems and di...
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Mar 2, 2025 · 1 min read · 💻 Problems Solved:✅ Contains Duplicate (Easy)✅ Valid Anagram (Easy)✅ Two Sum (Easy)✅ Group Anagrams (Medium) 🔍 Key Takeaways: Hashing is powerful! Used HashMaps (or Sets) for quick lookups in most problems. Sorting can simplify things. In "Valid ...
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Feb 19, 2025 · 3 min read · Cracking the Two Sum Problem: Brute Force, HashMap, and Sorting Approaches The Two Sum problem is a classic coding interview question: Given an array of integers nums and a target integer target, find the indices of the two numbers in nums that add u...
Join discussionJun 24, 2024 · 3 min read · A HashMap in Java is a part of the Java Collections Framework and provides a way to store key-value pairs, where keys are unique. It is part of the java.util package and implements the Map interface. The HashMap class allows null values and the null ...
Join discussionJun 18, 2024 · 6 min read · In this article, we will explore arrays and hashing problems with the top 5 famous challenges. If you've ever been frustrated by dynamic arrays or hashing problems on platforms like LeetCode, don't worry! After reading this article, you'll master the...
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Apr 26, 2024 · 7 min read · A HashMap is a part of the Java's Collection and is used to store key-value pairs. Each key is mapped to a single value, and while duplicate keys are not allowed, duplicate values are permitted. We will learn about how a HashMap works internally, how...
RRiyaz commentedFeb 9, 2024 · 2 min read · what is HashMap ? HashMap is a data Structure that can store data in key value pairs/ HashMap remembers the original insertion order of keys . HashMap has a property that represents the size of the map. Map Methods MethodDescription new M...
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Dec 26, 2023 · 3 min read · Otherwise known as hash map, hash, and dictionary. A Hash Table is a data structure that organizes data for fast lookups; finding a value for a given key is fast with hash tables on average. A hash table is much like an array, except that it lets you...
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