摘要：
来源poj 2398 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 阅读全文
摘要：
1.求解点与直线的关系，判断在直线哪一边 int direction(point p1,point p2,point p3)//p1是向量起点，p2是终点，p3是判断点， 0则在左边＜0在右侧 { return (p1.x p3.x) (p2.y p3.y) (p1.y p3.y) (p2.x p3 阅读全文
摘要：
来源 poj 2318 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 to 阅读全文