Coordinates of the bottom left corner of the first black sheet are (x3,y3)(x3,y3), and the top right — (x4,y4)(x4,y4). Coordinates of the bottom left corner of the second black sheet are (x5,y5)(x5,y5), and the top right — (x6,y6)(x6,y6). Example of three ...
Let's consider an infinite sheet of grid paper. Initially all the cells are white and you can paint some of them black. Two cells are called 8-neigbours if they share a side or a corner. An 8-path between black cellsAandBis a sequence of cellsX0=A,X1, ·s,XL-1,XL=Bsuch that...
C. White Sheet 题目链接:https://codeforces.com/contest/1216/problem/C 题目大意:给你两个黑色矩形和一个白色矩形的左下和右上角的坐标,问你白色矩形是否能够完全被黑色矩形覆盖 解题思路:如果白色矩形能够被黑色矩形完全覆盖,则白色矩形边上的所有
由于上面的观察我们能够推知每个位置的修改是没有后效性的,也就是修改位置的顺序没有影响,因此每次修改的位置就是相邻两张图片中不同的那些位置,直接枚举即可 时间复杂度\(\Theta(nmk)\) Code Link 2. [1763C] - Another Array Problem Rating:2000 Status:Hint + Data Evaluate:Medium 注意到如下的观察: 观...
White Sheet 题目http://codeforces.com/contest/1216/problem/C 题意 给你三个矩形的左下角坐标和右上角坐标。 第一个矩形为白矩形,第二第三个为黑矩形。 问两个黑矩形能不能将白矩形给覆盖住,可以输出NO,不能输出YES。 题解 分情况讨论: 第一二种是,单个黑矩形覆盖白矩形的情况。 第三种是两个黑...
In the first test sample Vasya can make an garland of area 6: he can use both sheets of colorb, three (but not four) sheets of colora and cut a single sheet of color c in three, for example, equal pieces. Vasya can use the resulting pieces to make a garland of area 6. In the...
dp[i]:以第i位为结尾的答案(长度大于1的)。dp[i] = max(第一种情况,第二种情况)。解释一下,首先我们可以做到求出i前面gap[j] > gap[i],j < i最大的j的位置pos,然后其中第一种情况为:自力更生,区间pos～i内gap[i]是最大的。这种情况可以使用线段树logn得到区间内最大右子段和;其中第二种情况...
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Nick is interested in prime numbers. Once he read aboutGoldbach problem. It states that every even integer greater than2can be expressed as the sum of two primes. That got Nick's attention and he decided to invent a problem of his own and call itNoldbach problem. Since Nick is interested...
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