Data Structures and Algorithms

We will solve the valid sudoku leetcode problem using HashSet approach, along with implementation in C++, Java and Python.

We will solve the leetcode problem called Subarray Sum equals K using brute force and prefix sum approaches.

Find out how to remove the nth node from the end of a linked list using two pointers approach, with implementation in C++, Java and Python.

Here is the solution to the leetcode problem to find top k frequent elements in an array using hashmap approach.

Understand the Majority Element leetcode problem, using Boyer-Moore majority vote algorithm with implementation in C++, Java, and Python.

Learn how to find the longest palindromic subsequence using dynamic programming with implementation in C++, Java, and Python.

To become a good programmer, you have to solve a lot of programming problems first to master this skill. One such common problem is LCS, which is asked in many...

Learn how to solve the Word Search 2 leetcode problem using the Backtracking approach in C++, Java, and Python.

Learn how to solve the leetcode problem of 2 keys keyboard using dynamic programming in C++, Java, and Python.

Understand the different ways to solve the 4 Sum problem using naive approach and 4 pointer method with examples in C++, Python and Java.