算法

https://leetcode.cn/problems/yong-liang-ge-zhan-shi-xian-dui-lie-lcof/ 用两个栈实现一个队列。队列的声明如下，请实现它的两个函数

https://leetcode.cn/problems/cong-wei-dao-tou-da-yin-lian-biao-lcof/ 输入一个链表的头节点，从尾到头反过来返回每个节点的值（用数组返

https://leetcode.cn/problems/ti-huan-kong-ge-lcof/?favorite=xb9nqhhg 请实现一个函数，把字符串 s 中的每个空格替换成"%20"。

找出数组中重复的数字。 在一个长度为 n 的数组 nums 里的所有数字都在 0～n-1 的范围内。数组中某些数字是重复的，但不知道有几个数字重复了，也不知道每个数字重复了几次。请找出数组中任意一个重

https://www.nowcoder.com/practice/886370fe658f41b498d40fb34ae76ff9 描述 输入一个长度为 n 的链表，设链表中的元素的值为 ai ，输

https://leetcode.com/problems/super-egg-drop/ Discuss: https://www.cnblogs.com/grandyang/p/11048142.

https://www.nowcoder.com/practice/4c776177d2c04c2494f2555c9fcc1e49 描述 定义栈的数据结构，请在该类型中实现一个能够得到栈中所含最小元

https://leetcode.com/problems/lru-cache/ Discuss: https://www.cnblogs.com/grandyang/p/4587511.html D

https://leetcode.com/problems/edit-distance/ Discuss: https://www.cnblogs.com/grandyang/p/4344107.ht

https://leetcode.com/problems/coin-change/ Discuss: https://www.cnblogs.com/grandyang/p/5138186.html

https://leetcode.com/problems/longest-increasing-subsequence/ Discuss: https://www.cnblogs.com/grand

https://leetcode.com/problems/best-time-to-buy-and-sell-stock-iii/ You are given an array prices whe

https://leetcode.com/problems/best-time-to-buy-and-sell-stock-iv/ Discuss：https://www.cnblogs.com/gr

https://leetcode.com/problems/best-time-to-buy-and-sell-stock/ Discuss：https://www.cnblogs.com/grand

https://leetcode.com/problems/maximum-product-subarray/ Discuss：https://www.cnblogs.com/grandyang/p/

https://leetcode.com/problems/triangle/ Discuss：https://www.cnblogs.com/grandyang/p/4286274.html Giv

https://leetcode.com/problems/climbing-stairs/ Discuss：https://www.cnblogs.com/grandyang/p/4079165.h

https://leetcode.com/problems/sqrtx/ Discuss：https://www.cnblogs.com/grandyang/p/4346413.html Given

https://leetcode.com/problems/sudoku-solver/ Discuss：https://www.cnblogs.com/grandyang/p/4421852.htm

https://leetcode.com/problems/valid-sudoku/ Discuss：https://www.cnblogs.com/grandyang/p/4421217.html