rt,计算几何入门: TOYS Calculate the number of toys that land in each bin of a partitioned toy box. Mom and dad have a problem - their child John never puts his toys away when he is finished playing with them. They gave John a rectangular box to put his toy…

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) no intersection because they are parallel, 2) intersect in a line because they are on top of one another…

Intersecting Lines Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 16681   Accepted: 7192 Description 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…

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) no intersection because they are parallel, 2) intersect in a line because they are on top of one another…

Leyni, LOLI and Line Time Limit: 1000 MS    Memory Limit: 65536 K Total Submit: 181(54 users)   Total Accepted: 88(52 users)       Rating:         Special Judge: No Description Professor Leyni likes to help LOLIs with their math. This time, Leyni mee…

This article is made by Jason-Cow.Welcome to reprint.But please post the article's address. 好好领悟一下vector吧!加一行Left还可以判断是否在直线上... struct L{ D O;V v;db a; L(){} L(D O,V v):O(O),v(v){a=atan2(O.y,O.x);}//atan2(y,x)=atan(y/x) but the x is OK to be zero bl…

Intersecting Lines 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) no intersection because they are parallel, 2) intersect in a line because they are on…

题目链接:http://poj.org/problem?id=1269 Time Limit: 1000MS Memory Limit: 10000K Description 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) no intersection b…

Intersecting Lines Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 13481   Accepted: 5997 Description 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…

http://poj.org/problem?id=1269 我会说这种水题我手推公式+码代码用了1.5h? 还好新的一年里1A了---- #include <cstdio> #include <cstring> #include <cmath> #include <string> #include <iostream> #include <algorithm> #include <queue> #include <…