def differentValuesInMultiplicationTable2(n, m):
    Matrix = [[0 for x in range(m)] for y in range(n)]
    for row in range(0,n):
        for col in range(0,m):
            Matrix[row][col]= (row+1)*(col+1)

    return find_diff(list(Matrix))

def find_diff(matr):
    nested = matr
    flat = [x for sublist in nested for x in sublist]
    return len(list(set(flat)))