Sorting

In this post, we will see about Topological Sorting in the graph. Topological Sorting is ordering of vertices or nodes such if there is an edge between (u,v) then u should come before v in topological sorting. Topological sort is possible only for Directed Acyclic Graph(DAG). If there is a cycle in graph, then there […]

In this post, we will see how to sort an array in java. There are various ways to sort array in java. You can implement different sorting algorithms to sort an array. You can use Arrays.sort method to sort array in java. There are various overloaded versions of Arrays.sort method. You can go through it […]

If you want to practice data structure and algorithm programs, you can go through data structure and algorithm interview programs. Selection sort is an in place comparison sorting algorithm. It is very simple to implement but it does not go well with large number of inputs. Selection sort algorithm Find the minimum element in the list. […]

Shell sort is in place comparison based sorting algorithm. It is generalization of insertion sort. It was invented by Donald shell. It allows to sort elements which are far apart. In case of insertion sort, comparison happens between only adjacent elements but in shell sort, it avoid comparing adjacent elements until last steps. Last step of shell […]

If you want to practice data structure and algorithm programs, you can go through data structure and algorithm interview questions. Quick sort or partition-exchange sort, is a sorting algorithm, which is using divide and conquer algorithm. In quick sort, we first choose a pivot and divide into two sublists,one will contain elements lower than pivot and […]

Counting sort is special sorting technique used to sort elements between specific range. Lets say elements belong to range 1 to K , then Counting sort can be used to sort elements in O(N) times. Basic idea of counting sort to find number of elements less than X, so X can be put to its […]

In this post, we will see how to implement heap sort in java. I will divide heap sort in multiple parts to make it more understandable. What is heap? A heap is a tree with some special properties, so value of node should be greater than or equal to(less than or equal to in case […]

If you want to practice data structure and algorithm programs, you can go through data structure and algorithm interview programs. In this post, we will see how to implement insertion sort in java. Insertion sort is very much similar to bubble sort. Insertion sort Algorithm Insertion sort works by comparing values at index with all its […]

If you want to practice data structure and algorithm programs, you can go through data structure and algorithm interview questions. In this post, we will see how to implement Bubble sort in java. Bubble sort is also known as sinking sort.Bubble sort is a comparison based sorting algorithm and is very easy to implement. Bubble sort […]