Check if one string is a subsequence of another string.
Objective: Given two strings, write a program to check if any of the given string is a subsequence of another string. Example if given strings are A and B then EITHER A is subsequence...
Category: Beginner
Most frequent word
Objective: Given an array of string, write a program to find the word in the array which appears the maximum number of times. Example: Input: [Algorithms, String, Integer, Integer, Algorithms, String, Integer, Algorithms, String,...
Given an array, count the number of pairs with a given sum.
Objective: Given an array of integers, write a program to count all the pairs with the given sum. Example: Given array: [1, 5, 7, 1, -1], Sum= 6 Total Pairs: 3 Note: pairs are...
Two Sum Problem
Objective: Given an array of integers, and k. Write a program to find indexes of two elements in an array which sum is equal to K. Example: Given array: [5, 4, 7, 3, 9,...
Given an array, find the number of all pairs with odd sum.
Objective: Given an array of integers, write a program to find the number of pairs with even odd. Example: Given Input: [1, 2, 3, 4] Number of odd pairs: 4 Note: (1, 2), (1,...
Sum of distinct elements among two given sets
Objective: Given two sets of elements, find the sum of all distinct elements from the set. In other words, find the sum of all elements which are present in either of the given set. ...
Insert a node in the given sorted linked list.
Objective: Given a linked list in which nodes are sorted in ascending order. Write an algorithm to insert a given node into the linked list so that all the nodes in the list will...
Print sorted unique elements of a given array
Objective: Given an array of integers with duplicates, write a program to print unique elements in the array in sorted order. Example: Given Input: [6, 1, 8, 5, 2, 10, 17, 25, 6, 5,...
Find the sum of overlapping elements in two sets
Objective: Given two sets of integers, write an algorithm to print the sum of overlapping elements in two sets. Note: Elements in each set are unique or there are no duplicates within a set....
Given two coordinates, Print the line equation
Objective: Given two coordinates (x1, y1) and (x2, y2). Write a java program to construct a line equation that passes through the given coordinates. Line Equation: Given two coordinates (x1, y1) and (x2, y2)...
Print all middle elements of the given matrix/2D array.
Objective: Given a two-dimensional array, write a program to print all middle elements of the array. Or In other words, print all the elements from the array except boundary elements. Example: int [][] grid...
Depth-First Search (DFS) in 2D Matrix/2D-Array – Recursive Solution
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 a recursive manner. Example: int [][] grid = new...
Hamming Distance between two given integers
Objective: Given two integers, write an algorithm to calculate the hamming distance between the integers. Hamming Distance: Hamming distance between two integers is the number of positions at which the bits are different. Example:...
Breadth-First Search (BFS) in 2D Matrix/2D-Array
Objective: Given a two-dimensional array or matrix, Do the breadth-First Search (BFS) to print the elements of the given matrix. Implement a Breadth-first traversal in an iterative manner. Example: int [][] grid = new...
Find all the Armstrong numbers in the given range
Objective: Given a range of integers, wrote a program to find all the Armstrong numbers in that range. What is Armstrong number: Determine the number of digits in the number. Call that n. Then...