Week 12: February 8 - 14
Given two square matrices A and B of dimensions m × n and n × q respectively:
Then the matrix C of dimension m × q is called their product:
The operation of multiplication of two matrices is feasible only if the number of columns in the first factor equals to the number of rows in the second. In this case we say that the shape of the matrices is consistent.
Given two matrices A and B. Find their product.
The first line contains two positive integers
ma - the dimensions of matrix A. Each of the next
na rows contains
ma numbers - the elements
aij of matrix A. In (
na + 2)-nd row two positive integers
mb are given - the dimensions of matrix B. In the following
mb numbers are given - the elements
bij of matrix B. Dimensions of the matrices do not exceed 100 × 100, all integers do not exceed 100 by absolute value.
Print in the first line the dimensions of the resulting matrix C:
mc. In the next
nс rows print space separated
mc numbers - the corresponding elements
cij of matrix C. If you can not multiply matrixs in the first and only line of output -1.
2 3 1 3 4 5 -2 3 3 3 1 3 2 2 1 3 0 -1 1
2 3 7 2 15 1 10 7