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Algorithmic Paradigms

Brute Force Greedy Algorithms Divide and Conquer Dynamic Programming

Searching and Sorting

Selection Sort, Bubble Sort, and Insertion Sort

Time Complexities of Sorting Algorithms (Overview)

Searching Algorithms

Challenge: Find Two Numbers that Add up to "n"

Solution: Find Two Numbers that Add up to "n"

Challenge: Search in a Rotated Array

Solution: Search in a Rotated Array

Challenge: Find the Median of Two Sorted Arrays

Solution: Find the Median of Two Sorted Arrays

Challenge: Find Duplicates in Array

Solution: Find Duplicates in Array

Challenge: Search in Sorted Matrix

Solution: Search in Sorted Matrix

Challenge: Count Element Occurrence

Solution: Count Element Occurrence

Challenge: Search Insert Position

Solution: Search Insert Position

Challenge: Sparse Search

Solution: Sparse Search

Challenge: Dutch National Flag Problem

Solution: Dutch National Flag Problem

Quiz on Sorting & Searching

Graph Algorithms

Introduction to Graph Algorithms and Implementation Challenge 1: Implement Breadth First Search Solution Review: Implement Breadth First Search Challenge 2: Implement Depth-First Search Solution Review: Implement Depth-First Search Challenge 3: Calculate the Number of Nodes in a Given Graph Level Solution: Number of Nodes in a Given Graph Level Challenge 4: Print the Transpose of a Graph Solution Review: Print the Transpose of a Graph Challenge 5: Count the Paths Between Two Nodes Solution Review: Count the Paths Between Two Nodes Challenge 6: Check if a Graph is Strongly Connected Solution Review: Check if a Graph is Strongly Connected Challenge 7: Print all the Connected Components in a Graph Solution Review: Print all the Connected Components of a Graph Challenge 8: Removing a Given Edge Solution Review: Removing an Edge Challenge 9: Check If Given Graph is Bipartite Solution Review: Check if a Given Graph is Bipartite Quiz on Graph Algorithms

Greedy Algorithms

What is a Greedy Approach?Problem 1: Make a Change Machine!Solution 1: Make Your own Change Machine!Problem 2: Connecting 'n' Pipes with Minimum Cost Solution 2: Connecting 'n' Pipes with Minimum Cost Problem 3: Find the Egyptian Fraction Solution 3: Find the Egyptian Fraction Problem 4: Minimum Number of Platforms Required for Train Station Solution 4: Minimum Number of Platforms Required for TrainStation Problem 7: Find the Largest Number Solution 7: Find the Largest Number Quick Quiz!

Dynamic Programming

Fibonacci Series Using Recursion Introducing Dynamic Programming With Fibonacci Numbers Memoizing Fibonacci Numbers Tabulating Fibonacci Numbers Challenge: The 0/1 Knapsack Problem Solution: The 0/1 Knapsack Problem Challenge 4: Longest Common Substring Solution Review: Longest Common Substring Challenge: Shortest Common Supersequence Solution Review: Shortest Common Supersequence Challenge 6: Longest Palindromic Subsequence Solution Review: Longest Palindromic Subsequence Challenge 7: The Coin Change Problem Solution Review: Coin Change Problem Challenge 8: Egg Dropping Problem Solution Review: Egg Dropping Problem Challenge 9: Strings Interleaving Solution Review: Strings Interleaving Challenge: Edit Distance Problem Solution Review: The Edit Distance Problem Quiz on Dynamic Programming

Divide and Conquer

Introduction to Divide and Conquer with Binary Search Pascal's Triangle Challenge 1: Euclidean Algorithm Solution Review 1: Euclidean Algorithm Challenge 2: Peak Element Solution Review 2: Peak Element Challenge 4: Missing Number in Sorted Array Solution Review 4: Missing Number in Sorted Array Challenge 5: Find the Closest Number Solution Review 5: Find the Closest Number Challenge 6: Shuffle Integers Solution Review 6: Shuffle Integers Challenge 7: Collect Coins in Minimum Steps Solution Review 7: Collect Coins in Minimum Steps Challenge 8: Merge a Number of Sorted Arrays Solution Review 8: Merge a Number of Sorted Arrays Challenge 9: Find the Floor and Ceiling of a Number Solution Review 9: Find the Floor and Ceil of a Number Challenge 10: Inversion Count in an Array Solution Review 10: Inversion Count in an Array Quiz on Divide and Conquer

Conclusion

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Untitled Masterpiece

Write a function to find the duplicates in an array in the most efficient way.

Problem statement

Given an array, find all the duplicates that exist in that array.

Input

An integer array.

Output

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