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Given a function rand7 which generates a uniform random integer in the range 1 to 7, write a function rand10 which generates a uniform random integer 阅读全文
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题目描述 王强今天很开心，公司发给N元的年终奖。王强决定把年终奖用于购物，他把想买的物品分为两类：主件与附件，附件是从属于某个主件的，下表就是一些主件与附件的例子： 主件 附件 电脑 打印机，扫描仪 书柜 图书 书桌 台灯，文具 工作椅 无 如果要买归类为附件的物品，必须先买该附件所属的主件。每个主 阅读全文
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Given a Binary Search Tree (BST) with the root node root, return the minimum difference between the values of any two different nodes in the tree. Exa 阅读全文
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Given a string S, check if the letters can be rearranged so that two characters that are adjacent to each other are not the same. If possible, output 阅读全文
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Given a positive integer n and you can do operations as follow: If n is even, replace n with n/2. If n is odd, you can replace n with either n + 1 or 阅读全文
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Given a non-negative integer num, repeatedly add all its digits until the result has only one digit. Example: Follow up:Could you do it without any lo 阅读全文
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In a given integer array nums, there is always exactly one largest element. Find whether the largest element in the array is at least twice as much as 阅读全文
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Find all possible combinations of k numbers that add up to a number n, given that only numbers from 1 to 9 can be used and each combination should be 阅读全文