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建表语句与原题： Create table If Not Exists Product (product_id int, product_name varchar(30)) Create table If Not Exists Sales (product_id varchar(30), perio 阅读全文
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一、原题描述 You have a pointer at index 0 in an array of size arrLen. At each step, you can move 1 position to the left, 1 position to the right in the arr 阅读全文
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一、原题描述 You are given an even number of people num_people that stand around a circle and each person shakes hands with someone else, so that there are 阅读全文
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1、原题描述 Given the following details of a matrix with n columns and 2 rows : The matrix is a binary matrix, which means each element in the matrix can b 阅读全文
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1、原题描述： Given a 2D grid consists of 0s (land) and 1s (water). An island is a maximal 4-directionally connected group of 0s and a closed island is an i 阅读全文
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1、原题目描述： Given a list of words, list of single letters (might be repeating) and score of every character. Return the maximum score of any valid set of 阅读全文
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一、原题描述 n passengers board an airplane with exactly n seats. The first passenger has lost the ticket and picks a seat randomly. But after that, the res 阅读全文
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一、原题描述 Table: Failed Table: Succeeded A system is running one task every day. Every task is independent of the previous tasks. The tasks can fail or s 阅读全文
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leetcode ,sql 阅读全文
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Table: Spending Write an SQL query to find the total number of users and the total amount spent using mobile only, desktop only and both mobile and de 阅读全文