B'You are given a matrix a , consisting of n rows by m columns. Each element of the matrix is equal to 0 or 1 . You can perform the following operation any number of times (possibly zero): choose an element of the matrix and replace it with either 0 or 1 . You are also given two arrays A and B (of length n and m respectively). After you perform the operations, the matrix should satisfy the following conditions: Calculate the minimum number of operations you have to perform. The first line contains two integers n and m ( 2 <= n, m <= 50 ). Then n lines follow. The i -th of them contains m integers a_{i,1}, a_{i,2}, ... , a_{i,m} ( 0 <= a_{i,j} <= 1 ). The next line contains n integers A_1, A_2, ... , A_n ( 0 <= A_i <= m ). The next line contains m integers B_1, B_2, ... , B_m ( 0 <= B_i <= n ). Print one integer -- the minimum number of operations you have to perform, or -1 if it is impossible. '...