Paytm

190+ posts

Last Updated: 15 November 2024

Given an array of coins[] of size n and a target value sum, where coins[i] represent the coins of different denominations. You have an infin ...read more

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Morgan Stanley

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C Program to Check for Palindrome String

Last Updated: 03 January 2025

A string is said to be palindrome if the reverse of the string is the same as the string. In this article, we will learn how to check whethe...read more

Basic Coding Problems

Move all zeros to end of array

Last Updated: 15 November 2024

Given an array of integers arr[], the task is to move all the zeros to the end of the array while maintaining the relative order of all non-...read more

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Stock Buy and Sell - Multiple Transaction Allowed

Last Updated: 17 December 2024

Given an array prices[] of size n denoting the cost of stock on each day, the task is to find the maximum total profit if we can buy and sel...read more

Convert Infix expression to Postfix expression

Last Updated: 06 December 2024

Write a program to convert an Infix expression to Postfix form.Infix expression: The expression of the form "a operator b" (a + b) i.e., whe...read more

expression-evaluation

DSA

Merge Sort - Data Structure and Algorithms Tutorials

Last Updated: 02 January 2025

Merge sort is a sorting algorithm that follows the divide-and-conquer approach. It works by recursively dividing the input array into sma...read more

Last Updated: 17 August 2024

Given a binary 2D matrix, find the number of islands. A group of connected 1s forms an island. For example, the below matrix contains 4 isla...read more

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graph-connectivity

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Coin Change - Count Ways to Make Sum

Last Updated: 16 November 2024

Given an integerarray of coins[] of size nrepresenting different types of denominations and an integer sum, the task is to count all combina...read more

Print a given matrix in spiral form

Last Updated: 21 December 2024

Given a matrix mat[][] of size m x n, the task is to print all elements of the matrix in spiral form.Examples:Input:mat[][] = [[1, 2, 3, ...read more

Basic Coding Problems

Rat in a Maze

Last Updated: 18 July 2024

We have discussed Backtracking and Knight's tour problem in Set 1. Let us discuss Rat in a Maze as another example problem that can be solve ...read more

Find duplicates in O(n) time and O(n) extra space

Last Updated: 24 December 2024

Given an array arr[] of n elements that contains elements from 0 to n-1, with any of these numbers appearing any number of times. The task i ...read more

Sort an array of 0s, 1s and 2s - Dutch National Flag Problem

Last Updated: 14 October 2024

Given an array arr[] consisting of only 0s, 1s, and 2s. The task is to sort the array, i.e., put all 0s first, then all 1s and all 2s in las...read more

Merge Sort for Linked Lists

Last Updated: 19 September 2024

Given asingly linked list, The task is tosortthe linked list innon-decreasingorder usingmerge sort.Examples: Input: 40 - 20 - 60 - 10 - 50 - ...read more

Reverse words in a string

Last Updated: 26 September 2024

Given a string str, the task is to reverse the order of the words in the given string. Notethatstrmay contain leading or trailing dots(.) or...read more

Search in a Sorted and Rotated Array

Last Updated: 07 December 2024

Given a sorted and rotated array arr[] of n distinct elements, the task is to find the index of given key in the array. If the key is not pr...read more

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