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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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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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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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分析 难度 易 来源 https://leetcode.com/problems/number-of-1-bits/ 题目 Write a function that takes an unsigned integer and returns the number of '1' bits it ha 阅读全文
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分析 难度 易 来源 https://leetcode.com/problems/reverse-bits/submissions/ 题目 Reverse bits of a given 32 bits unsigned integer. Example: Follow up: If this fu 阅读全文
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分析 难度 易 来源 https://leetcode.com/problems/rotate-array/submissions/ 题目 Given an array, rotate the array to the right by k steps, where k is non-negativ 阅读全文
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分析 难度 易 来源 https://leetcode.com/problems/customers-who-never-order/ 题目 Suppose that a website contains two tables, the Customers table and the Orders 阅读全文
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分析 难度 易 来源 https://leetcode.com/problems/combine-two-tables/ SQL LEFT JOIN 关键字 LEFT JOIN 关键字会从左表 (table_name1) 那里返回所有的行,即使在右表 (table_name2) 中没有匹配的行。 L 阅读全文
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分析 难度 易 来源 https://leetcode.com/problems/factorial-trailing-zeroes/ 题目 Given an integer n, return the number of trailing zeroes in n!. Example 1: Exam 阅读全文
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分析 难度 易 来源 https://leetcode.com/problems/excel-sheet-column-number 题目 Given a column title as appear in an Excel sheet, return its corresponding colum 阅读全文
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分析 难度 易 来源 https://leetcode.com/problems/majority-element/ JDK里的排序算法,效率就是高啊 题目 Given an array of size n, find the majority element. The majority eleme 阅读全文
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