点赞关注不迷路!,本节涉及初识Linux第二节,主要为常见的几条指令介绍。
Linux下基本指令
1. ls 指令 语法: ls [选项][目录或文件] 功能:对于目录,该命令列出该目录下的所有子目录与文件。对于文件&#…
60. Permutation Sequence
The set [1, 2, 3, …, n] contains a total of n! unique permutations.
By listing and labeling all of the permutations in order, we get the following sequence for n 3:
“123”“132”“213”“231”“312”“321”
Given n and k, re…