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Given a linked list, determine if it has a cycle in it.To represent a cycle in the given linked list, we use an integerposwhich represents the position (0-indexed)in the linked list where tail c...

Implement the following operations of a stack using queues.push(x) -- Push element x onto stack. pop() -- Removes the element on top of the stack. top() -- Get the top element. empty() -- Return...

Implement the following operations of a queue using stacks.push(x) -- Push element x to the back of queue. pop() -- Removes the element from in front of queue. peek() -- Get the front element. e...

Given twostringsSandT,return if they are equal when both are typed into empty text editors.#means a backspace character.Example 1:Input: S = "ab#c", T = "ad#c"Output: trueExplanation: B...

Given a linked list, reverse the nodes of a linked listkat a time and return its modified list.kis a positive integer and is less than or equal to the length of the linked list. If the number of...

Given a string containing just the characters'(',')','{','}','['and']', determine if the input string is valid.An input string is valid if:Open brackets must be closed by the same type of ...

Given alinked list, swap every two adjacent nodes and return its head.You maynotmodify the values in the list's nodes, only nodes itself may be changed.Example:Given 1->2->3->4 ...

Reverse a singly linked list.Example:Input: 1->2->3->4->5->NULLOutput: 5->4->3->2->1->NULLFollow up:A linked list can be reversed either iteratively or recurs...

Reverse a linked list from positionmton. Do it in one-pass.Note:1 ≤m≤n≤ length of list.Example:Input: 1->2->3->4->5->NULL, m = 2, n = 4Output: 1->4->3->2->5...

Given a linked list, return the node where the cycle begins. If there is no cycle, returnnull.To represent a cycle in the given linked list, we use an integerposwhich represents the position (0-...