考虑枚举最后中间的数字,然后可以用一个24位的整数来表示一个状态,一共有C(24,8)=735471种状态,然后BFS即可. 比赛的时候由于手速问题没写完TAT 写完后在坑爹评测机上还是TLE. 所以这是经过大量常数优化后的代码. #include<cstdio> struct P{int a,b,c,d;P(){}P(int _a,int _b,int _c,int _d){a=_a,b=_b,c=_c,d=_d;}}q[800000],x; bool v[1<<24]; int…

启发式搜索 启发式搜索是一种对搜索到的每一个位置进行评估,然后从评估的最优位置进行搜索直到目的地, 由于搜索时对每一个位置的评估是基于直观或经验的所有叫启发式搜索 A*算法 历史: 1964年Nils Nilsson提出了A1算法,是一个启发式搜索算法, 而后又被改进成为A2算法,直到1968年,被Peter E. Hart改进成为A*算法 主要思想: 1.对于每个搜索到的点求一个估价函数f(x). $\large f(x)=g(x)+h(x)$ 其中g(x)表示起点到当前点实际走的代价,h(x…

题目链接:https://icpcarchive.ecs.baylor.edu/index.php?option=com_onlinejudge&Itemid=8&category=648&page=show_problem&problem=5151You have a rectangle of size N × M, N rows from top to bottom and M columns from left to right,that is divided int…

The Rotation Game Time Limit : 30000/15000ms (Java/Other)   Memory Limit : 300000/150000K (Java/Other) Total Submission(s) : 29   Accepted Submission(s) : 12 Problem Description The rotation game uses a # shaped board, which can hold 24 pieces of squ…

Quaternion.identity就是指Quaternion(0,0,0,0),就是每旋转前的初始角度,是一个确切的值,而transform.rotation是指本物体的角度,值是不确定的,比如可以这么设置transform.rotation = Quaternion.identity;一个是值类型,一个是属性变量…

x轴旋转: CABasicAnimation *theAnimation; theAnimation=[CABasicAnimation animationWithKeyPath:@"transform.rotation.x"]; theAnimation.duration=; theAnimation.removedOnCompletion = YES; theAnimation.fromValue = [NSNumber numberWithFloat:]; theAnimatio…

今天分享一些基础控制的脚本 1.位置(Position): 控制位置很简单,首先要知道要在xyz哪几个轴上移动,确定好后定义代表着那些轴的移动变量,速度(m_speed在函数外定义为全局变量)然后通过if语句实现特定键对偏移量的增减,最后通过transform.translate实现移动  这些脚本要放在Update里 //在x和z轴的移动量 ; ; //实现移动控制 if (Input.GetKey(KeyCode.UpArrow)||Input.GetKey(KeyCode.W)) { mo…

1.8 Assume you have a method isSubstring which checks if one word is a substring of another. Given two strings, s1 and s2, write code to check if s2 is a rotation of si using only one call to isSubstring (e.g.,"waterbottle"is a rotation of "…

Description The rotation game uses a # shaped board, which can hold 24 pieces of square blocks (see Fig.1). The blocks are marked with symbols 1, 2 and 3, with exactly 8 pieces of each kind. Initially, the blocks are placed on the board randomly. You…

http://acm.hdu.edu.cn/showproblem.php?pid=4708 Rotation Lock Puzzle Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Problem Description Alice was felling into a cave. She found a strange door with a number square m…