poj3318 Matrix Multiplication 题意:给定$n*n(n<=500)$的矩阵$A,B,C$,如果$A*B==C$,输出“YES”,否则为“NO”:多组数据,$O(n^{3})$必T 我们可以随机生成一个神奇的列向量$v$,你可以把它看做n*1或1*n的矩阵,里面的元素随机为0或1 蓝后我们考察 $A*(B*v)$和$C*v$是否相等 灰常显然 $A*B!=C  ==>  A*(B*v)!=C*v$ 那么我们每次判断有$\frac{1}{2}$的概率判错 于是我们多判几…

                             Matrix Multiplication Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 18173   Accepted: 3912 Description You are given three n × n matrices A, B and C. Does the equation A × B = C hold true? Input The first l…

Matrix multiplication Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others) Problem Description Given two matrices A and B of size n×n, find the product of them. bobo hates big integers. So you are only asked to find t…

Matrix multiplication Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 820    Accepted Submission(s): 328 Problem Description Given two matrices A and B of size n×n, find the product of them. b…

hdu4920 Matrix multiplication Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others) Total Submission(s): 568    Accepted Submission(s): 225 Problem Description Given two matrices A and B of size n×n, find the product o…

D - Matrix Multiplication Time Limit: 2000/1000MS (Java/Others) Memory Limit: 128000/64000KB (Java/Others) SubmitStatus Problem Description       Let us consider undirected graph G = {V; E} which has N vertices and M edges. Incidence matrix of this g…

Matrix multiplication Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 1775    Accepted Submission(s): 796 Problem Description Given two matrices A and B of size n×n, find the product of them.…

Problem Description Given two matrices A and B of size n×n, find the product of them. bobo hates big integers. So you are only asked to find the result modulo 3.   Input The input consists of several tests. For each tests: The first line contains n (…

矩阵相乘,采用一行的去访问,比采用一列访问时间更短,根据数组是一行去储存的.神奇小代码. Matrix multiplication Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 1476    Accepted Submission(s): 650 Problem Description Given two matrices A…

Matrix Multiplication Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 17783   Accepted: 3845 Description You are given three n × n matrices A, B and C. Does the equation A × B = C hold true? Input The first line of input contains a posit…