## Lexicographically next permutation With One swap

Objective: Given an array of integers (in particular order or permutation of a set of numbers), write an algorithm to … Read more

Objective: Given an array of integers (in particular order or permutation of a set of numbers), write an algorithm to … Read more

Objective: Given a 2d grid map of ‘1’s (land) and ‘0’s (water), count the number of distinct or unique islands. … Read more

Objective: Given a graph and a source vertex write an algorithm to find the shortest path from the source vertex to … Read more

Objective: Given a graph represented by the adjacency List, write a Depth-First Search(DFS) algorithm to check whether the graph is … Read more

Earlier we had discussed how to evaluate prefix expression where operands are of single-digit. In this article, we will discuss … Read more

Prefix notation is a notation for writing arithmetic expressions in which the operands appear after their operators. There are no … Read more

Objective: You are working on a project where QA team has automated set of test cases for the project, but … Read more

Objective: Given a Prefix expression, write an algorithm to convert it into Postfix expression. Example: Input: Prefix expression: + A … Read more

Objective: Given a Postfix expression, write an algorithm to convert it into prefix expression. Example: Input: Postfix expression: A B … Read more

Objective: Given an input string, write an algorithm to find the longest contiguous character or in other words, find a … Read more

Objective: Given a Postfix expression, write an algorithm to convert it into Infix expression. Example: Input: Postfix expression: A B … Read more

Objective: Given a Prefix expression, write an algorithm to convert it into Infix expression. Example: Input: Prefix expression: + A … Read more

Objective: Given an Infix expression, write an algorithm to convert it into Prefix expression. Example: Input: Infix expression – A … Read more

Objective: Given a directed graph that represents a flow network involving source(S) vertex and Sink (T) vertex. Each edge in … Read more

Objective: Given an Infix expression, write an algorithm to convert it into Postfix expression. Example: Input: Infix expression – A … Read more