[LeetCode] Valid Phone Numbers 驗證電話號碼
Given a text file file.txt that contains list of phone numbers (one per line), write a one liner bash script to print all valid phone numbers. ...
原文：[LeetCode] 379. Design Phone Directory 設計電話目錄
Design a Phone Directory which supports the following operations: get: Provide a number which is not assigned to anyone. check: Check if a number is available or not. release: Recycle or release a nu ...
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