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Given a string S of '(' and ')' parentheses, we add the minimum number of parentheses ( '(' or ')', and in any positions ) so that the resulting paren 阅读全文
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7w6:第七周程序填空题3 描述 实现一个三维数组模版CArray3D，可以用来生成元素为任意类型变量的三维数组，使得下面程序输出结果是： 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29, 阅读全文
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You want to form a target string of lowercase letters. At the beginning, your sequence is target.length '?' marks. You also have a stamp of lowercase 阅读全文
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The i-th person has weight people[i], and each boat can carry a maximum weight of limit. Each boat carries at most 2 people at the same time, provided 阅读全文
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Given two arrays A and B of equal size, the advantage of A with respect to B is the number of indices i for which A[i] > B[i]. Return any permutation 阅读全文
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A robot on an infinite grid starts at point (0, 0) and faces north. The robot can receive one of three possible types of commands: -2: turn left 90 de 阅读全文
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二进制文件写： 二进制文件读： 二进制文件修改： 文件拷贝： 阅读全文
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We have a two dimensional matrix A where each value is 0 or 1. A move consists of choosing any row or column, and toggling each value in that row or c 阅读全文
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At a lemonade stand, each lemonade costs $5. Customers are standing in a queue to buy from you, and order one at a time (in the order specified by bil 阅读全文
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Given a string S of digits, such as S = "123456579", we can split it into a Fibonacci-like sequence [123, 456, 579]. Formally, a Fibonacci-like sequen 阅读全文