typedef struct row_prebuilt_struct row_prebuilt_t; /** A struct for (sometimes lazily) prebuilt structures in an Innobase table handle used within MySQL; these are used to save CPU time. */ struct row_prebuilt_struct { ulint magic_n; /*!< this magic…
算法:搜索+优先队列+(递归输出结果) The Princess has been abducted by the BEelzebub feng5166, our hero Ignatius has to rescue our pretty Princess. Now he gets into feng5166's castle. The castle is a large labyrinth. To make the problem simply, we assume the labyrint…
Guilty Prince Time Limit: 2 second(s) Memory Limit: 32 MB Once there was a king named Akbar. He had a son named Shahjahan. For an unforgivable reason the king wanted him to leave the kingdom. Since he loved his son he decided his son would be banish…
Red and Black Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 19690 Accepted Submission(s): 11965 Problem Description There is a rectangular room, covered with square tiles. Each tile is colo…
从$(0,0)$开始BFS$2\times10^6$步,那么迷宫的形状有三种: 1.走不完$2\times10^6$步,直接判定即可. 2.可以走到$(n,0)$以及$(0,m)$,那么直接把询问点平移到一开始的小迷宫里即可. 3.可以沿着$(dx,dy)$这个向量达到某些左上角,那么先三分沿向量走的步数,把询问点平移到最近距离之后再判定. #include<cstdio> typedef long long ll; const int N=105,M=2000010,U=(1<<…
题意: Ignatius and the Princess I Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 18410 Accepted Submission(s): 5929Special Judge http://acm.hdu.edu.cn/showproblem.php?pid=1026 大意 :图大小n*m,从(0,0…
一.单例模式是什么? 定义:确保一个类仅仅能产生一个实例,并且提供一个全局访问点来获取该实例. 二.单例模式怎么用? class SingleCase { public string Name{get;set;} public static SingleCase mySingle = null; public static object Flag = new object(); public static SingleCase getInstance(string name) { //判断是否实…
原创 题目大意:人质被困在迷宫之中,要求你寻找一条最短路径快速找到人质. 如图,人质在黄色点2处,营救者在起点红色处,1表示无法通过的障碍点,寻找一条最短路径快速找到人质. 毫无疑问用DFS,遍历4个方向,比较每条可以找到人质的路径即可得到答案. import java.util.Scanner; public class Maze_rescue { static int n; //行 static int m; //列 static int min=99999; static int maze…
Guilty Prince Time Limit: 2 second(s) Memory Limit: 32 MB Once there was a king named Akbar. He had a son named Shahjahan. For an unforgivable reason the king wanted him to leave the kingdom. Since he loved his son he decided his son would be banish…
import threading class Test(object): from threading import Lock lock = Lock() flag = None def __new__(cls, *args, **kwargs): with cls.lock: if cls.flag is None: cls.flag = super().__new__(cls) return cls.flag def func(): res = Test() print(res) t = t…
A - Red and Black There is a rectangular room, covered with square tiles. Each tile is colored either red or black. A man is standing on a black tile. From a tile, he can move to one of four adjacent tiles. But he can't move on red tiles, he can move…
