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package leadcode; /** * 541. Reverse String II * Easy * 199 * 575 * * * Given a string and an integer k, you need to reverse the first k characters for every 2k characters counting from t... 阅读全文
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557. Reverse Words in a String III 557. Reverse Words in a String III Given a string, you need to reverse the order of characters in each word within 阅读全文
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627. Swap Salary SQL Schema 627. Swap Salary SQL Schema Given a table salary, such as the one below, that has m=male and f=female values. Swap all f a 阅读全文