1462. Course Schedule IV
There are a total of numCourses courses you have to take, labeled from 0 to numCourses – 1. You are given an array prerequisites where prerequisites[i] = [ai, […]
2127. Maximum Employees to Be Invited to a Meeting
A company is organizing a meeting and has a list of n employees, waiting to be invited. They have arranged for a
Remove loop in Linked List
Given the head of a linked list that may contain a loop. A loop means that the last node of
Find the first node of loop in linked list
Given a head of the singly linked list. If a loop is present in the list then return the first node of the loop else return NULL. Custom Input format:A head of a
2948. Make Lexicographically Smallest Array by Swapping Elements
You are given a 0-indexed array of positive integers nums and a positive integer limit. In one operation, you can choose any two indices i and j and swap nums[i] and nums[j] if |nums[i] – nums[j]| <= limit.
802. Find Eventual Safe States
There is a directed graph of n nodes with each node labeled from 0 to n – 1. The graph is represented by a 0-indexed 2D integer
Detect Loop in linked list
You are given the head of a singly linked list. Your task is to determine if the linked list contains a loop. A
1267. Count Servers that Communicate
You are given a map of a server center, represented as a m * n integer matrix grid, where 1 means that on
Clone List with Next and Random
You are given a special linked list with n nodes where each node has two pointers a next pointer that points to the next
Add Number Linked Lists
Given the head of two singly linked lists num1 and num2 representing two non-negative integers. The task is to return the head of the linked list
1765. Map of Highest Peak
You are given an integer matrix isWater of size m x n that represents a map of land and water cells. If isWater[i][j] == 0, cell (i, j) is a land cell. If isWater[i][j]
Linked List Group Reverse
Given the head a linked list, the task is to reverse every k node in the linked list. If the number of nodes is not a