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Gunjan C.Jul 17 · 4 min read

LeetCode #01 | 2390. Removing Stars From a String | Stack Approach | Java, C & Python

👋 Introduction Welcome to LeetCode Visualized! In this series, we'll solve LeetCode problems using visual explanations, intuitive walkthroughs, and clean implementations in Java, Python, and C. Today

leetcodevisualized.hashnode.dev

Ankit kumar SinghJul 11 · 7 min read

🚀 Mastering LeetCode 611: Valid Triangle Number | From Brute Force to Two Pointers (Complete Beginner Guide)

Introduction When I first solved this problem, my first thought was: "Let's check every possible triplet." That solution works, but it has a time complexity of O(n³). Then I looked at the optimized

ankitsingh2003.hashnode.dev

Puja JorwarJun 30 · 7 min read

Next Permutation — The 3-Step Algorithm That Made Everything Click

Most solutions I found online just showed me code with zero explanation of why it works.After solving this problem, I finally understood the pattern. Let me save you the confusion. 📖 First — What is

pujajorwar.hashnode.dev

AJIT KUMAR PANDITApr 24 · 6 min read

Finding Triplets That Sum to Zero: A Deep Dive into threeSum

Hello everyone! Today, we're going to unravel a classic problem in computer science: finding all unique triplets in an array that sum up to zero. This is a common interview question and a great way to

ajitkumarpandit.nakprc.com

Syed Faysel Ahammad RajoMar 11 · 6 min read

Learning DSA with Java

A focused 15-day plan can give you a fast, practical start in data structures and algorithms (DSA) using Java. The goal of this plan is not to make you an expert in two weeks, but to give you a solid

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himanshuFeb 13 · 2 min read

Day 11 - Two Integer Sum II

Question Given an array of integers numbers that is sorted in non-decreasing order. Return the indices (1-indexed) of two numbers, [index1, index2], such that they add up to a given target number target and index1 < index2. Note that index1 and index...

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himanshuFeb 12 · 2 min read

Day 10 - Valid Palindrome

Question Given a string s, return true if it is a palindrome, otherwise return false. A palindrome is a string that reads the same forward and backward. It is also case-insensitive and ignores all non-alphanumeric characters. Note: Alphanumeric chara...

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himanshuFeb 11 · 3 min read

Day 9 - Longest Consecutive Sequence

Question Given an array of integers nums, return the length of the longest consecutive sequence of elements that can be formed. A consecutive sequence is a sequence of elements in which each element is exactly 1 greater than the previous element. The...

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himanshuFeb 5 · 5 min read

Day 4 - Group Anagrams

Question Given an array of strings strs, group all anagrams together into sublists. You may return the output in any order. An anagram is a string that contains the exact same characters as another string, but the order of the characters can be diffe...

blogs-himanshu.hashnode.dev

ARCHANA GURUSAMYFeb 4 · 2 min read

Problem: Leet Code 7 - Reverse Integer

QUESTION: Given a signed 32-bit integer x, return x with its digits reversed. If reversing x causes the value to go outside the signed 32-bit integer range [-2<sup>31</sup>, 2<sup>31</sup> - 1], then return 0. Assume the environment does not allow yo...

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LeetCode #01 | 2390. Removing Stars From a String | Stack Approach | Java, C & Python

🚀 Mastering LeetCode 611: Valid Triangle Number | From Brute Force to Two Pointers (Complete Beginner Guide)

Next Permutation — The 3-Step Algorithm That Made Everything Click

Finding Triplets That Sum to Zero: A Deep Dive into threeSum

Learning DSA with Java

Day 11 - Two Integer Sum II

Day 10 - Valid Palindrome

Day 9 - Longest Consecutive Sequence

Day 4 - Group Anagrams

Problem: Leet Code 7 - Reverse Integer