向量的差乘和点乘
摘要：
差乘： 向量a×向量b=|a|*|b|*sinθ 点乘： 向量a·向量b=|a|*|b|*cosθ 坐标运算中： 向量a·向量b=a1a2+b1b2+c1c2 向量a×向量b= | i j k| |a1 b1 c1| |a2 b2 c2| =(b1c2-b2c1,c1a2-a1c2,a1b2-a2b 阅读全文
posted @ 2017-08-11 13:40 Yxter 阅读(6807) 评论(0) 推荐(0) 编辑
hdu 6103 Kirinriki（尺取法）
摘要：
Kirinriki Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 933 Accepted Submission(s): 377 Problem 阅读全文
posted @ 2017-08-11 11:10 Yxter 阅读(168) 评论(0) 推荐(0) 编辑
hdu 6098 Inversion
摘要：
Inversion Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 339 Accepted Submission(s): 230 Problem 阅读全文
posted @ 2017-08-11 09:45 Yxter 阅读(104) 评论(0) 推荐(0) 编辑
hdu 6106 Classes
摘要：
Classes Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 290 Accepted Submission(s): 187 Problem 阅读全文
posted @ 2017-08-11 09:25 Yxter 阅读(116) 评论(0) 推荐(0) 编辑
