原文:https://leetcode.com/problems/word-frequency/ Write a bash script to calculate the frequency of each word in a text file words.txt. For simplicity sake, you may assume: words.txt contains only lowercase characters and space ' ' characters. Each wo…
Define S = [s,n] as the string S which consists of n connected strings s. For example, ["abc", 3]="abcabcabc". On the other hand, we define that string s1 can be obtained from string s2 if we can remove some characters from s2 such tha…