题目链接 Square Subsets 这是白书原题啊 先考虑状压DP的做法 2到70总共19个质数,所以考虑状态压缩。 因为数据范围是70,那么我们统计出2到70的每个数的个数然后从2考虑到70。 设dp[x][mask]为考虑到x这个数的时候,x这个数和之前的所有数中,选出某些数,他们的乘积分解 ...
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其他好文 时间:
2017-12-08 14:16:24
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203
Description A factory produces products packed in square packets of the same height h and of the sizes 1*1, 2*2, 3*3, 4*4, 5*5, 6*6. These products ar ...
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其他好文 时间:
2017-12-08 10:32:11
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177
继承与派生类 在ES6之前,实现继承与自定义类型是一个不小的工作。严格意义上的继承需要多个步骤实现 Square继承自Rectangle,为了这样做,必须用一个创建自Rectangle.prototype的新对象重写Square.prototype并调用Rectangle.call()方法。JS新手 ...
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其他好文 时间:
2017-12-08 00:05:16
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225
Given a set of sticks of various lengths, is it possible to join them end to end to form a square? Input The first line of input contains N, the numbe ...
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其他好文 时间:
2017-12-07 18:53:47
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141
Description: Implement int sqrt(int x). Compute and return the square root of x. x is guaranteed to be a non-negative integer. Example 1: Example 2: 解 ...
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其他好文 时间:
2017-12-05 20:07:02
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108
``` 28个纯css3 加载loading动画特效 ... ...
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Web程序 时间:
2017-12-05 16:01:13
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203
Given a non-negative integer c, your task is to decide whether there're two integers a and b such that a2 + b2 = c. Example 1: Input: 5 Output: True E... ...
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其他好文 时间:
2017-12-03 12:50:14
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141
Given a 2D binary matrix filled with 0's and 1's, find the largest square containing only 1's and return its area. For example, given the following ma ...
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其他好文 时间:
2017-12-02 11:13:43
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174
标签: ACM 题目: Farmer John has purchased a lush new rectangular pasture composed of M by N (1 ≤ M ≤ 12; 1 ≤ N ≤ 12) square parcels. He wants to grow some ...
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其他好文 时间:
2017-11-30 20:13:21
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197
In this lesson you will create a utility function that allows you to quickly compose behavior of multiple functions to create new behavior. By the end ...
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编程语言 时间:
2017-11-30 19:19:20
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140