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有序数组旋转相关问题。 "153. Find Minimum in Rotated Sorted Array" Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., might become 阅读全文
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"101. Symmetric Tree" 判断一棵二叉树是不是镜像对称的。 Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). For example, thi 阅读全文
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合并两个已排序的链表。 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 ma 阅读全文
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两个链表反转问题。 "206. Reverse Linked List" Reverse a singly linked list. Hint: A linked list can be reversed either iteratively or recursively. Could you im 阅读全文
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两个全排列问题。 "46. Permutations" Given a collection of distinct numbers, return all possible permutations. For example, [1,2,3] have the following permutat 阅读全文
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who 显示在线登陆用户 whoami 显示当前操作用户 hostname 显示主机名 uname 显示系统信息 top 动态显示当前耗费资源最多进程信息 ps 显示瞬间进程状态 ps aux du 查看目录大小 du h /home带有单位显示目录信息 df 查看磁盘大小 df h 带有单位显示磁 阅读全文