Apr 15, 2026
You are given two linked lists: list1 and list2 of sizes n and m respectively. Remove list1’s nodes from the...
leetcodemediumlinked-list
Apr 13, 2026
You are given an array of events where events[i] = [startDay, endDay]. You can attend an event on any single...
leetcodemediumgreedyheap
Apr 12, 2026
Given an integer n, return a list of all possible full binary trees with n nodes. Each node has value...
leetcodemediumtreerecursionmemoization
Apr 11, 2026
Given an array nums, find two indices i and j (i != j) such that the digit sum of nums[i]...
leetcodemediumhash-maparray
Apr 10, 2026
You are given a list of tasks to complete in order. Each day you can complete one task. After completing...
leetcodemediumhash-mapsimulation
Apr 9, 2026
Given an integer array nums and an integer k, find the maximum sum among all subarrays of length k that...
leetcodemediumsliding-windowhash-map