James Pan

原题网址：https://leetcode.com/problems/find-the-duplicate-number/Given an array nums containing n + 1 integers where each integer is between 1 and n (inclusive), prove that at least one duplicate nu

原题网址：https://leetcode.com/problems/wiggle-sort-ii/Given an unsorted array nums, reorder it such that nums[0] nums[2] .Example:(1) Given nums = [1, 5, 1, 1, 6, 4], one possible answer is

原题网址：https://leetcode.com/problems/contains-duplicate-iii/Given an array of integers, find out whether there are two distinct indices i and j in the array such that the difference between nums[i] 

原题网址：https://leetcode.com/problems/maximum-gap/Given an unsorted array, find the maximum difference between the successive elements in its sorted form.Try to solve it in linear time/space.

原题网址:https://leetcode.com/problems/rearrange-string-k-distance-apart/Given a non-empty string str and an integer k, rearrange the string such that the same characters are at least distance k fro