## Print boundary of given matrix/2D array.

Objective: Given a two-dimensional array, write a program to print the boundary of the array. Example: int [][] grid = new int[][] { {1, 2, 3, 4}, {5, 6, 7, 8}, {9, 8, 7,...

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Objective: Given a two-dimensional array, write a program to print the boundary of the array. Example: int [][] grid = new int[][] { {1, 2, 3, 4}, {5, 6, 7, 8}, {9, 8, 7,...

Objective: Given a two-dimensional array or matrix, Do the depth-First Search (DFS) to print the elements of the given matrix. Implement the Depth-first traversal in an iterative manner. Example: int [][] grid = new...

Objective: Given a stack, write a program to print the stack elements in reverse order. Example: Approach: Use Temporary stack: Take temporary stack, and copy all the items from the given stack to a...

Objective: Given a stack of integers, write an algorithm to sort the stack using recursion. Example: Original Stack: [14, 9, 67, 91, 101, 25] Sorted Stack: [9, 14, 25, 67, 91, 101] Original Stack:...

Objective: Given an array of numbers, write an algorithm to print all the subsets sum individually. Example: Given Input: [1, 2] Output: 3 1 2 0 Explanation: subsets are [0], [1], [2], [1, 2]...

Objective: Given an array of integers write an algorithm to find all the subsets for which sum is equal to zero. The array contains both positive and negative integers. Example: Given Array: [8, 3,...

Objective: Given a two-dimensional array or matrix, Write an algorithm to print the given matrix in a zigzag manner or in other words print all the diagonals of the matrix. Example: int [][] grid...

Objective: Given a 2d grid map of ‘1’s (land) and ‘0’s (water), count the number of islands. An island is surrounded by water and is formed by connecting adjacent lands horizontally or vertically. Assume...

Earlier we had discussed how to evaluate postfix expressions where operands are of single-digit. In this article, we will discuss how to evaluate postfix expressions for any number ( not necessarily single digit.) Postfix...

Problem Statement: When customers book an Airbnb the total price, which includes base price + service fee + cleaning fee. all these prices are in decimals. Write an algorithm to round each price such...

Objective: Given an array of integers, write an algorithm to find the third smallest element in the array. Example: Int [] a = { 6, 8, 1, 9, 2, 10}; Output: Third smallest element...

Objective: Given a Stack, write an algorithm to reverse the stack. Example: Original Stack: [14, 9, 67, 91, 101, 25] Reversed Stack: [25, 101, 91, 67, 9, 14] Approach: Use Recursion In this solution,...

Objective: Given a stack of integers, write an algorithm to sort the stack using a temporary stack. Example: Given Stack: [14, 9, 67, 91, 101, 25] Sorted Stack: [9, 14, 25, 67, 91, 101]...

Objective: Given an array of strings, write an algorithm to group the anagrams. Example: Input: [rat, art, cat, act, dog, god, tar, pat] Output: [rat, art, tar] [cat, act] [pat] [dog, god] Approach: If...

Earlier we have seen linear search and binary search and how these work individually, In this article we will compare these two search algorithms. If you are new to these, please read the prerequisites...

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