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【CodeForces - 124D】Squares (旋转坐标系,计算几何,思维)
题干: You are given an infinite checkered field. You should get from a square (x1; y1) to a square (x2; y2). Using the shortest path is not necessary. ...
2018-10-27
0
522
【51Nod - 1094】和为k的连续区间 (前缀和,二分查找)
题干: 一整数数列a1, a2, ... , an(有正有负),以及另一个整数k,求一个区间i,ji,j,(1 <= i <= j <= n),使得aii + ... + ajj = k。 Input 第1行:2个数N,K。N为数列的长度。K为需要求的和。(2 <= N...
2018-10-27
0
412
【POJ - 3304 】Segments(计算几何,思想转化,直线和线段相交)
题干: Given n segments in the two dimensional space, write a program, which determines if there exists a line such that after projecting these segments...
2018-10-27
0
302
【POJ - 1269 】Intersecting Lines (计算几何,直线间的位置关系)
题干: We all know that a pair of distinct points on a plane defines a line and that a pair of lines on a plane will intersect in one of three ways: 1) ...
2018-10-27
0
374
【POJ - 2398】Toy Storage (计算几何,二分找位置,叉积,点和直线的位置关系)
题干: Mom and dad have a problem: their child, Reza, never puts his toys away when he is finished playing with them. They gave Reza a rectangular bo...
2018-10-27
0
359
【CodeForces - 202A】LLPS (思维,字符串)
题干: This problem's actual name, "Lexicographically Largest Palindromic Subsequence" is too long to fit into the page headline. You are giv...
2018-10-26
0
671
C++关于引用的注意事项 总结知识点
对函数的引用: #include<iostream> #include<algorithm> #include<queue> #include<map> #include<vector> #include<set> #inc...
2018-10-26
0
454
【HDU - 2444】The Accomodation of Students(二分图判断 + 匈牙利算法求最大匹配)
题干: There are a group of students. Some of them may know each other, while others don't. For example, A and B know each other, B and C know each othe...
2018-10-25
0
368
【UVALive - 3126】Taxi Cab Scheme (二分图,最小路径覆盖)
题目大意: 有n个出车安排,一辆车能接到这个安排的条件是:1、这辆车第一次发车;2、这辆车接了上一个安排,回到这个安排的起点的时间正好是这个安排的前一分钟或者更早 解题报告: 建图然后跑最小路径覆盖。就是答案。注意搭边的条件不是光看距离,还要加上每个任务的起点到终点的时间。 AC代码:...
2018-10-25
0
407
【CodeForces - 760B 】Frodo and pillows (二分题意,注意细节)
题干: n hobbits are planning to spend the night at Frodo's house. Frodo has n beds standing in a row and m pillows (n ≤ m). Each hobbit needs a bed and...
2018-10-25
0
621
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