1、hust 1017 Exact cover (Dancing Links 模板题) 题意:n*m的单位矩阵。现在要选一些行,使得这些行的集合中每列只出现一个1. 思路:裸的精确覆盖问题。刷一遍模板。 1 #include <iostream> 2 #include <stdio.h> 3 #in ...
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其他好文 时间:
2017-08-14 00:31:32
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css background-size 属性详解,background-size 指定背景图像大小,以象素或百分比显示,当指定为百分比时,大小会由所在区域的宽度、高度以及 background-origin 的位置决定,还可以通过 cover 和 contain 来对图片进行伸缩。backgroun ...
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Web程序 时间:
2017-08-12 12:36:18
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题目背景 以下为不影响题意的简化版题目。 题目描述 一个n*n的网格图上有m个探测器,每个探测器有个探测半径r,问这n*n个点中有多少个点能被探测到。 输入输出格式 输入格式: 第一行3个整数n,m,r 接下来m行,每行两个整数x,y表示第i个探测器的坐标 输出格式: 能被探测到的点的个数 输入输出 ...
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其他好文 时间:
2017-08-11 20:29:51
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153
Given two binary trees and imagine that when you put one of them to cover the other, some nodes of the two trees are overlapped while the others are n ...
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其他好文 时间:
2017-08-06 00:56:49
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Given two binary trees and imagine that when you put one of them to cover the other, some nodes of the two trees are overlapped while the others are n ...
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其他好文 时间:
2017-07-27 18:37:54
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163
背景ie9+ background-size 为背景图片定义宽高 cover 铺满背景区域,多余的裁切 contain 缩放图片完全显示出来,背景大小不符合有留白 px em % 注:如果自定义则传递两个参数,background-attachment为fixed时无效 ie7 8兼容写法:filt ...
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Web程序 时间:
2017-07-25 10:13:13
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151
Given two binary trees and imagine that when you put one of them to cover the other, some nodes of the two trees are overlapped while the others are n ...
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其他好文 时间:
2017-07-24 21:20:16
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213
1. Introduction This document is intended to provide best practices for Business Rule Optimisation for Planning and PBCS models. It will cover items w ...
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其他好文 时间:
2017-07-13 00:53:33
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preview: '.' Matches any single character. '*' Matches zero or more of the preceding element. The matching should cover the entire input string (not p... ...
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其他好文 时间:
2017-07-10 10:37:37
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Given two binary trees and imagine that when you put one of them to cover the other, some nodes of the two trees are overlapped while the others are n ...
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其他好文 时间:
2017-07-08 21:06:52
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