# Sorting Algorithms

A Sorting Algorithm is used to rearrange a given array elements according to a comparison operator on the elements.

**‘Recent Articles’ on Sorting**

**Topic :**

- Bitonic Sort
- Pancake sorting
- Binary Insertion Sort
- BogoSort or Permutation Sort
- Gnome Sort
- Sleep Sort – The King of Laziness / Sorting while Sleeping
- Structure Sorting (By Multiple Rules) in C++
- Stooge Sort
- Tag Sort (To get both sorted and original)
- Tree Sort
- Cartesian Tree Sorting
- Odd-Even Sort / Brick Sort
- QuickSort on Singly Linked List
- QuickSort on Doubly Linked List
- 3-Way QuickSort (Dutch National Flag)
- Merge Sort for Linked Lists
- Merge Sort for Doubly Linked List
- 3-way Merge Sort

**Library Implementations of Sorting Algorithms : **

- Know Your Sorting Algorithm | Set 1 (Sorting Weapons used by Programming Languages)
- Know Your Sorting Algorithm | Set 2 (Introsort- C++’s Sorting Weapon)
- Comparator function of qsort() in C
- sort() in C++ STL
- C qsort() vs C++ sort()
- Arrays.sort() in Java with examples
- Collections.sort() in Java with Examples

- Asymptotic Analysis and comparison of sorting algorithms
- Hoare’s vs Lomuto partition scheme in QuickSort
- Serial Sort v/s Parallel Sort in Java
- An Insertion Sort time complexity question
- Time complexity of insertion sort when there are O(n) inversions?
- Lower bound for comparison based sorting algorithms
- Which sorting algorithm makes minimum number of memory writes?
- When does the worst case of Quicksort occur?
- Can QuickSort be implemented in O(nLogn) worst case time complexity?
- QuickSort Tail Call Optimization (Reducing worst case space to Log n )
- Why Quick Sort preferred for Arrays and Merge Sort for Linked Lists?
- Where is Heap Sort used practically?
- Find memory conflicts among multiple threads

- Sort elements by frequency | Set 1
- Sort elements by frequency | Set 2
- Count Inversions in an array | Set 1 (Using Merge Sort)
- Sort an array of 0s, 1s and 2s
- Find the Minimum length Unsorted Subarray, sorting which makes the complete array sorted
- Find whether an array is subset of another array | Added Method 3
- Sort a nearly sorted (or K sorted) array
- Sort numbers stored on different machines
- Sort a linked list of 0s, 1s and 2s
- A Pancake Sorting Problem
- Find number of pairs (x, y) in an array such that x^y > y^x
- Count all distinct pairs with difference equal to k
- C Program for Bubble Sort on Linked List
- Sort n numbers in range from 0 to n^2 – 1 in linear time
- C Program to Sort an array of names or strings
- Sort an array according to the order defined by another array
- Given a sorted array and a number x, find the pair in array whose sum is closest to x
- Sort an array in wave form
- Check if any two intervals overlap among a given set of intervals
- How to efficiently sort a big list dates in 20’s
- Sort an almost sorted array where only two elements are swapped
- Find the point where maximum intervals overlap
- Sort a linked list that is sorted alternating ascending and descending orders?
- C++ program for Sorting Dates using Selection Sort
- How to sort an array of dates in C/C++?
- Sorting Strings using Bubble Sort
- Maximum product of a triplet (subsequnece of size 3) in array
- Find missing elements of a range
- Find a permutation that causes worst case of Merge Sort
- Minimum sum of two numbers formed from digits of an array
- Find minimum difference between any two elements
- Convert an array to reduced form | Set 1 (Simple and Hashing)
- Sorting Vector of Pairs in C++ | Set 1 (Sort by first and second)
- Sorting Vector of Pairs in C++ | Set 2 (Sort in descending order by first and second)
- Sorting 2D Vector in C++ | Set 1 (By row and column)
- Sorting 2D Vector in C++ | Set 2 (In descending order by row and column)
- Sorting 2D Vector in C++ | Set 3 (By number of columns)
- Find Surpasser Count of each element in array
- Rearrange positive and negative numbers with constant extra space
- Sort an array according to count of set bits
- Count distinct occurrences as a subsequence
- Minimum number of swaps required to sort an array
- Number of swaps to sort when only adjacent swapping allowed
- Minimum swaps to make two arrays identical
- Find elements larger than half of the elements in an array
- Count minimum number of subsets (or subsequences) with consecutive numbers
- Sum of all elements between k1’th and k2’th smallest elements
- Number of sextuplets (or six values) that satisfy an equation
- Sort an array according to absolute difference with given value
- Minimize the sum of product of two arrays with permutations allowed
- Position of an element after stable sort
- Chocolate Distribution Problem
- Sort even-placed elements in increasing and odd-placed in decreasing order
- Permute two arrays such that sum of every pair is greater or equal to K
- Chose k array elements such that difference of maximum and minimum is minimized
- Sort an array when two halves are sorted
- Find pair with greatest product in array
- Minimum swap required to convert binary tree to binary search tree
- K-th smallest element after removing some integers from natural numbers
- Check whether Arithmetic Progression can be formed from the given array
- Bucket Sort To Sort an Array with Negative Numbers
- Possible to form a triangle from array values
- Maximum difference between frequency of two elements such that element having greater frequency is also greater
- Check if reversing a sub array make the array sorted
- Find all triplets with zero sum
- Sort a Matrix in all way increasing order
- Sort array after converting elements to their squares
- Sort all even numbers in ascending order and then sort all odd numbers in descending order
- Sorting Big Integers
- Sort an array of large numbers
- Sort 3 Integers without using if condition or using only max() function
- Minimum difference between max and min of all K-size subsets
- Minimum swaps to reach permuted array with at most 2 positions left swaps allowed
- Convert an array to reduced form | Set 2 (Using vector of pairs)
- Find sum of non-repeating (distinct) elements in an array
- Minimum sum of absolute difference of pairs of two arrays
- Find the largest multiple of 3 from array of digits | Set 2 (In O(n) time and O(1) space)
- Noble integers in an array (count of greater elements is equal to value)
- Find maximum height pyramid from the given array of objects
- Program to check if an array is sorted or not (Iterative and Recursive)
- Smallest Difference Triplet from Three arrays
- Smallest Difference pair of values between two unsorted Arrays
- Find whether it is possible to make array elements same using one external number
- Sort an array of strings according to string lengths
- Check if it is possible to sort an array with conditional swapping of adjacent allowed
- Sort an array after applying the given equation
- Print array of strings in sorted order without copying one string into another
- Sort elements on the basis of number of factors

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