661-图片平滑器(Image Smoother) 原文链接: https://leetcode-cn.com/problems/image-smoother 英文原文An image smoother is a filter of the size 3 x 3 that can be 2021-12-03 数组矩阵 简单
664-奇怪的打印机(Strange Printer) 原文链接: https://leetcode-cn.com/problems/strange-printer 英文原文There is a strange printer with the following two special p 2021-12-03 动态规划字符串 困难
665-非递减数列(Non-decreasing Array) 原文链接: https://leetcode-cn.com/problems/non-decreasing-array 英文原文Given an array nums with n integers, your task is to c 2021-12-03 数组 中等
667-优美的排列 II(Beautiful Arrangement II) 原文链接: https://leetcode-cn.com/problems/beautiful-arrangement-ii 英文原文Given two integers n and k, construct a list answe 2021-12-03 数学数组 中等
668-乘法表中第k小的数(Kth Smallest Number in Multiplication Table) 原文链接: https://leetcode-cn.com/problems/kth-smallest-number-in-multiplication-table 英文原文Nearly everyone has used the Mu 2021-12-03 二分查找 困难
669-修剪二叉搜索树(Trim a Binary Search Tree) 原文链接: https://leetcode-cn.com/problems/trim-a-binary-search-tree 英文原文Given the root of a binary search tree and the lo 2021-12-03 二叉搜索树二叉树树深度优先搜索 中等
670-最大交换(Maximum Swap) 原文链接: https://leetcode-cn.com/problems/maximum-swap 英文原文You are given an integer num. You can swap two digits at most 2021-12-03 数学贪心 中等
672-灯泡开关 Ⅱ(Bulb Switcher II) 原文链接: https://leetcode-cn.com/problems/bulb-switcher-ii 英文原文There is a room with n bulbs labeled from 1 to n that all 2021-12-03 位运算广度优先搜索数学深度优先搜索 中等
673-最长递增子序列的个数(Number of Longest Increasing Subsequence) 原文链接: https://leetcode-cn.com/problems/number-of-longest-increasing-subsequence 英文原文Given an integer array nums, 2021-12-03 动态规划数组树状数组线段树 中等
675-为高尔夫比赛砍树(Cut Off Trees for Golf Event) 原文链接: https://leetcode-cn.com/problems/cut-off-trees-for-golf-event 英文原文You are asked to cut off all the trees in a fo 2021-12-03 堆(优先队列)广度优先搜索数组矩阵 困难