class Solution
{
//Function to multiply two matrices.
static int[][] multiplyMatrix(int A[][], int B[][])
{
int n1 = a.length;
int m1 = a[0].length;
int n2 = b.length;
int m2 = b[0].length;
if(m1!=n2)
{
int arr0[][] = new int[1][1];
arr0[0][0] = -1;
return arr0;
}
int arr[][] = new int[n1][m2];
for(int i = 0 ; i<n1 ; i++)
for(int j = 0 ; j<m2 ; j++)
for(int q = 0; q<n2 ; q++)
arr[i][j]+= a[i][q]*b[q][j];
return arr;
}
}
