题目要读很久才能理解它的意思和笑点(如果你也看过那个笑话的话),读懂之后就会发现是一个高斯消元法的题目,对于我来说难点不在高斯消元,而在于字符串处理.先来说说题意吧: 总共有n个人,n个人都会有一段话,先是princess说话,里面如果提到了a1,a2,a3...这几个不同的人的话,对应提到的次数是x1,x2,x3..的话,那么下一个对话是ai这个人说的概率是xi/(x1+x2+x3)....,然后下一个人的对话里也会提到别的人,然后也有一定的概率会有下一轮对话,现在要问的就是,给定了这些对话,…

Flip Game Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 37427   Accepted: 16288 Description Flip game is played on a rectangular 4x4 field with two-sided pieces placed on each of its 16 squares. One side of each piece is white and the…

别人都是广搜+优先队列,我没空临时学,所以就直接自己暴力了 Ignatius and the Princess I Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 9803    Accepted Submission(s): 2922Special Judge Problem Description The Princess has b…

Ignatius and the Princess I Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 17930    Accepted Submission(s): 5755Special Judge Problem Description The Princess has been abducted by the BEelzebub…

Ignatius and the Princess III Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 11810    Accepted Submission(s): 8362 Problem Description "Well, it seems the first problem is too easy. I will let…

Ignatius and the Princess I Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 13911    Accepted Submission(s): 4370 Special Judge Problem Description The Princess has been abducted by the BEelzeb…

Rescue The Princess Time Limit: 1000ms   Memory limit: 65536K  有疑问?点这里^_^ 题目描述 Several days ago, a beast caught a beautiful princess and the princess was put in prison. To rescue the princess, a prince who wanted to marry the princess set out immedia…

Ignatius and the Princess IV Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32767 K (Java/Others)Total Submission(s): 27227    Accepted Submission(s): 11562 Problem Description "OK, you are not too bad, em... But you can never pass the…

题目链接: http://poj.org/problem?id=1222 题目大意:一堆开关,或开或关.每个开关按下后,周围4个方向开关反转.问使最后所有开关都关闭的,开关按法.0表示不按,1表示按. 解题思路: 一共只有5*6个开关. 对于每个开关,设其最终状态为x5,上下左右四个开关最终状态分别为x1,x2,x3,x4, 那么有方程x1^x2^x3^x4^x5^初始状态=0. 这样就有30个方程.解这30个线性方程组即可. 用高斯消元法来解方程组,变化如下: ①对于原本找列中绝对值最大这一步…

 HDU 1028 Ignatius and the Princess III Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Description "Well, it seems the first problem is too easy. I will let you know how foolish you are later." feng5166 says. &q…