摘要：
分析 难度 易 来源 https://leetcode.com/problems/valid-phone-numbers/ 题目 Given a text file file.txt that contains list of phone numbers (one per line), write 阅读全文
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摘要：
分析 难度 易 来源 https://leetcode.com/problems/valid-phone-numbers/ 题目 Given a text file file.txt that contains list of phone numbers (one per line), write 阅读全文
摘要：
分析 写bash，不太会啊…… 难度 中 来源 https://leetcode.com/problems/word-frequency/ 题目 Write a bash script to calculate the frequency of each word in a text file wo 阅读全文
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