How Long Does It Take Given the relations of all the activities of a project, you are supposed to find the earliest completion time of the project. In ...
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2021-06-02 14:53:07
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题目链接：F. Unusual Matrix 思路：我们可以发现，如果$a_{i,j}$不等于$b_{i,j}$那么他们变化的次数一定是奇数次，否则一定是偶数次，而该元素变化的总次数是行变化次数+列变化次数，所以我们通过$a_{1,1}$就能将1行和1列的情况枚举出来，进一步，因为我们知道其他元素的 ...
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2021-06-02 13:11:18
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Given a hash table of size N, we can define a hash function H(x)=x%N. Suppose that the linear probing is used to solve collisions, we can easily obtai ...
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2021-06-02 12:19:23
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You have n boxes. You are given a binary string boxes of length n, where boxes[i] is '0' if the ith box is empty, and '1' if it contains one ball. In ...
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2021-06-02 10:37:12
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给你一个二维矩阵 matrix 和一个整数 k ，矩阵大小为 m x n 由非负整数组成。 矩阵中坐标 (a, b) 的 值 可由对所有满足 0 <= i <= a < m 且 0 <= j <= b < n 的元素 matrix[i][j]（下标从 0 开始计数）执行异或运算得到。 请你找出 ma ...
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2021-05-24 16:03:59
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Given a tree, you are supposed to list all the leaves in the order of top down, and left to right. Input Specification: Each input file contains one t ...
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2021-05-24 14:03:04
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Given a stack which can keep M numbers at most. Push N numbers in the order of 1, 2, 3, ..., N and pop randomly. You are supposed to tell if a given s ...
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2021-05-24 13:43:08
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Given a constant K and a singly linked list L, you are supposed to reverse the links of every K elements on L. For example, given L being 1→2→3→4→5→6, ...
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2021-05-24 13:17:05
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Given a sequence of K integers { N?1??, N?2??, ..., N?K?? }. A continuous subsequence is defined to be { N?i??, N?i+1??, ..., N?j?? } where 1≤i≤j≤K. T ...
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2021-05-24 12:48:45
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选词填空-填单词20题Directions: Complete each sentence using the words given below. Each word can be used only once. Change the form where necessary.fraught re ...
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2021-05-24 11:07:57
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