James Pan

原题网址：https://leetcode.com/problems/reorder-list/Given a singly linked list L: L0→L1→…→Ln-1→Ln,reorder it to: L0→Ln→L1→Ln-1→L2→Ln-2→…You must do this in-place without altering the nodes' va

原题网址：https://leetcode.com/problems/number-of-islands-ii/A 2d grid map of m rows and n columns is initially filled with water. We may perform an addLand operation which turns the water at posit

原题网址：https://leetcode.com/problems/summary-ranges/Given a sorted integer array without duplicates, return the summary of its ranges.For example, given [0,1,2,4,5,7], return ["0->2","4->5","7

原题网址：https://leetcode.com/problems/merge-two-sorted-lists/Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lis

原题网址：https://leetcode.com/problems/merge-k-sorted-lists/Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity.方法：使用最小堆维护当前最小值。/** * Definition fo

原题网址：https://leetcode.com/problems/merge-intervals/Given a collection of intervals, merge all overlapping intervals.For example,Given [1,3],[2,6],[8,10],[15,18],return [1,6],[8,10],[15,1

原题网址：https://leetcode.com/problems/insert-interval/Given a set of non-overlapping intervals, insert a new interval into the intervals (merge if necessary).You may assume that the intervals w

原题网址：https://leetcode.com/problems/merge-sorted-array/Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array.Note:You may assume that nums1 has enough