含极角序排序模板.   Space Ant Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 5334   Accepted: 3312 Description The most exciting space discovery occurred at the end of the 20th century. In 1999, scientists traced down an ant-like creature in th…

地址: 题目: Space Ant Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 4295   Accepted: 2697 Description The most exciting space discovery occurred at the end of the 20th century. In 1999, scientists traced down an ant-like creature in the pl…

                                                     Space Ant 明天早上最后一科毛概了,竟然毫无复习之意,沉迷刷题无法自拔~~ 题意:说实话没有仔细看,大概是一只右眼失明(只能左转)的蚂蚁每天要吃掉一个点的食物才能活下去,现在给出n个点的坐标,求蚂蚁最多能活多少天? 一看就是循环求凸包一直往里循环,数据只有50,这让我有勇气尝试一发.样例水过了却WA了三发.讨论区说的是用点积或者叉积,但我觉得循环凸包思路也行啊.吃饭的时候突然意识到我…

Space Ant Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 2876   Accepted: 1839 Description The most exciting space discovery occurred at the end of the 20th century. In 1999, scientists traced down an ant-like creature in the planet Y19…

链接:http://poj.org/problem?id=1696 Space Ant Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 3077   Accepted: 1965 Description The most exciting space discovery occurred at the end of the 20th century. In 1999, scientists traced down an a…

Space Ant Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 2489   Accepted: 1567 Description The most exciting space discovery occurred at the end of the 20th century. In 1999, scientists traced down an ant-like creature in the planet Y19…

Space Ant Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 3840   Accepted: 2397 Description The most exciting space discovery occurred at the end of the 20th century. In 1999, scientists traced down an ant-like creature in the planet Y19…

Space Ant Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 3316   Accepted: 2118 Description The most exciting space discovery occurred at the end of the 20th century. In 1999, scientists traced down an ant-like creature in the planet Y19…

Space Ant 大意:有一仅仅蚂蚁,每次都仅仅向当前方向的左边走,问蚂蚁走遍全部的点的顺序输出.開始的点是纵坐标最小的那个点,開始的方向是開始点的x轴正方向. 思路:从開始点開始,每次找剩下的点中与当前方向所形成的夹角最小的点,为下一个要走的点(好像就是犄角排序,我不是非常会),夹角就是用点积除以两个向量的距离,求一下acos值. 之前一直用叉积做,做了好久例子都没过,发现用错了... 题目挺好的,有助于理解点积与叉积 struct Point{ double x, y; int id; }…

Space Ant The most exciting space discovery occurred at the end of the 20th century. In 1999, scientists traced down an ant-like creature in the planet Y1999 and called it M11. It has only one eye on the left side of its head and just three feet all…