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
2017. Grid Game
You are given a 0-indexed 2D array grid of size 2 x n, where grid[r][c] represents the number of points at position (r, c) on the matrix. Two robots
Merge two sorted linked lists
Given the head of two sorted linked lists consisting of nodes respectively. The task is to merge both lists and return the head of the sorted merged list. Examples: