题目链接:http://172.16.200.33/JudgeOnline/problem.php?id=1002 题意:给你两个四位数的素数,求最少经过多少步的变化能够从一个素数变到另一个素数.在变得过程中,要求都是素数,而且每个新的数和原来的数只有一位不一样. 思路:因为是四位的素数,所以先对素数打表,然后BFS,每次进入队列的是八个只有一个数字不同的四位数,并且还要是素数就入队 #include <cstdio> #include <queue> #include <c…

Prime Path Time Limit: 1000MS   Memory Limit: 65536KB   64bit IO Format: %I64d & %I64u Submit Status Description The ministers of the cabinet were quite upset by the message from the Chief of Security stating that they would all have to change the fo…

  POJ 3126  Prime Path Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 16204   Accepted: 9153 Description The ministers of the cabinet were quite upset by the message from the Chief of Security stating that they would all have to change…

Prime Path Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 14091 Accepted: 7959 Description The ministers of the cabinet were quite upset by the message from the Chief of Security stating that they would all have to change the four-digit r…

题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=1973 Prime Path Description The ministers of the cabinet were quite upset by the message from the Chief of Security stating that they would all have to change the four-digit room numbers on their offices…

Prime Path DescriptionThe ministers of the cabinet were quite upset by the message from the Chief of Security stating that they would all have to change the four-digit room numbers on their offices.— It is a matter of security to change such things e…

Description The ministers of the cabinet were quite upset by the message from the Chief of Security stating that they would all have to change the four-digit room numbers on their offices.  — It is a matter of security to change such things every now…

Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 9519   Accepted: 5458 Description The ministers of the cabinet were quite upset by the message from the Chief of Security stating that they would all have to change the four-digit room numb…

POJ3126 Prime Path 一开始想通过终点值双向查找,从最高位开始依次递减或递增,每次找到最接近终点值的素数,后来发现这样找,即使找到,也可能不是最短路径, 而且代码实现起来特别麻烦,后来搜了一下解题报告,才发现是bfs(). 想想也是,题目其实已经提示的很清楚了,求最短的路径,对于每一个数,每次可以把4位中的任意一位,  换成与该位不相同的0-9中的任意一位,对于迷宫类 bfs每次转移数为上下左右四个状态,而此题就相当于每次可以转移40个状态(其实最低位为偶数可以排除,不过题目数据…

Prime Path Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 15325   Accepted: 8634 Description The ministers of the cabinet were quite upset by the message from the Chief of Security stating that they would all have to change the four-dig…