# Data Structures and Algorithms

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## Leetcode 217: Contains Duplicate

This lesson will teach you how to find the duplicate element using a hashing algorithm.

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## Leetcode 1295: Find Numbers with Even Number of Digits

This problem tests your knowledge of mathematics. Solving this problem helps you find the place values and how they are represented in the decimal number system.

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## Array Strengths, Weaknesses, and Big-O Complexities

In this lesson, you will learn about array strengths and weaknesses along with the big-o complexities.

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## Find the Largest Element In the Array

In this lesson, you will learn how to approach the problem, and come up with different strategies to solve the problem.

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## Leetcode 1: Two Sum Problem

This lesson on "Two Sum" coding problem is discussed thoroughly with illustrations and various approaches with running time complexities.

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## How To Print a 2D Array Elements?

This lesson teaches you how to iterate through a 2D array of integers. The same follows with other data types.

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