求二叉树的层序遍历
https://www.nowcoder.com/practice/04a5560e43e24e9db4595865dc9c63a3
二叉树的中序遍历
https://www.nowcoder.com/practice/0bf071c135e64ee2a027783b80bf781d
岛屿数量
https://www.nowcoder.com/practice/0c9664d1554e466aa107d899418e814e
链表中环的入口结点
https://www.nowcoder.com/practice/253d2c59ec3e4bc68da16833f79a38e4
01背包
https://www.nowcoder.com/practice/2820ea076d144b30806e72de5e5d4bbf
排序
https://www.nowcoder.com/practice/2baf799ea0594abd974d37139de27896
括号序列
https://www.nowcoder.com/practice/37548e94a270412c8b9fb85643c8ccc2
用两个栈实现队列
https://www.nowcoder.com/practice/54275ddae22f475981afa2244dd448c6
子数组的最大累加和问题
https://www.nowcoder.com/practice/554aa508dd5d4fefbf0f86e5fe953abd
判断链表中是否有环
https://www.nowcoder.com/practice/650474f313294468a4ded3ce0f7898b9
最小的K个数
https://www.nowcoder.com/practice/6a296eb82cf844ca8539b57c23e6e9bf
反转链表
https://www.nowcoder.com/practice/75e878df47f24fdc9dc3e400ec6058ca
合并两个有序的数组
https://www.nowcoder.com/practice/89865d4375634fc484f3a24b7fe65665
二叉树的最大深度
https://www.nowcoder.com/practice/8a2b2bf6c19b4f23a9bdb9b233eefa73
跳台阶
https://www.nowcoder.com/practice/8c82a5b80378478f9484d87d1c5f12a4
按之字形顺序打印二叉树
https://www.nowcoder.com/practice/91b69814117f4e8097390d107d2efbe0
实现二叉树先序，中序和后序遍历
https://www.nowcoder.com/practice/a9fec6c46a684ad5a3abd4e365a9d362
链表中的节点每k个一组翻转
https://www.nowcoder.com/practice/b49c3dc907814e9bbfa8437c251b028e
最长无重复子数组
https://www.nowcoder.com/practice/b56799ebfd684fb394bd315e89324fb4
最大公约数
https://www.nowcoder.com/practice/cf4091ca75ca47958182dae85369c82c
合并两个排序的链表
https://www.nowcoder.com/practice/d8b6b4358f774294a89de2a6ac4d9337
寻找第K大
https://www.nowcoder.com/practice/e016ad9b7f0b45048c58a9f27ba618bf
设计LRU缓存结构
https://www.nowcoder.com/practice/e3769a5f49894d49b871c09cadd13a61
最长公共子串
https://www.nowcoder.com/practice/f33f5adc55f444baa0e0ca87ad8a6aac
删除链表的倒数第n个节点
https://www.nowcoder.com/practice/f95dcdafbde44b22a6d741baf71653f6
买卖股票的最好时机
https://www.nowcoder.com/practice/64b4262d4e6d4f6181cd45446a5821ec