Dec 29, 2025 · 4 min read · Using the Two Sum exercise from LeetCode we can study how a problem can be solved with less complexity. The description of the problem is very simple: Given an array of integers nums and an integer target, return indices of the two numbers such that...
Join discussionJul 11, 2025 · 7 min read · Let’s dive into explaining the solution for LeetCode Problem 1356: Sort Integers by The Number of 1 Bits, covering the problem requirements, the provided code’s functionality, a complexity analysis, and verifying the solution’s correctness. The code ...
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Jul 9, 2025 · 12 min read · If you've been writing Java for a while, you've probably used both int and Integer without thinking much about the difference. While Java's auto-boxing and unboxing features make our code more convenient to write, they can silently destroy your appli...
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Jul 7, 2025 · 7 min read · Java Array Types Comparison: int[], ArrayList<>, and Array<> Overview Java provides different ways to work with collections of data. This document compares three approaches: primitive arrays (int[]), the ArrayList<> class, and generic arrays (Array<>...
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Jul 8, 2024 · 2 min read · Data types in java Java has two categories of data types: primitive and reference. Primitive types are the basic types that store values directly in memory, such as int, char, boolean, and so on. Reference types are the types that store references to...
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