本文参考自: 原文地址 A. HQ9 time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output HQ9 is a joke programming language which has only four one-character instructions: "H" prints "Hello, W…
#凉肝的比赛 ##A - Mezo Playing Zoma Today, Mezo is playing a game. Zoma, a character in that game, is initially at position x0. Mezo starts sending n commands to Zoma. There are two possible commands:
‘L’ (Left) sets the position x:x−1; ‘R’ (Right) s…
一句话总结:
atan2(a,b)是4象限反正切,它的取值不仅取决于a/b的atan值,还取决于点 (b, a) 落入哪个象限 当点(b, a) 落入第一象限时,atan2(a,b)的范围是 0 ~ pi/2; 当点(b, a) 落入第二象限时,atan2(a,b)的范围…