Convert element of list to integer(Two dimentional array)

[killerrex]

You need to transform each row first to integer, either when you read the values:

for i in range(r):
    row = input("Row values:")
    m.append([int(s) for s in row.split()])

Or later:

m = [[int(s) for s in row] for row in m]

Remember that numpy only transforms a matrix given as a list of lists to a 2D array if all the lists have the same number of elements, so you might want to use the c value that you are not using to guarantee that the user inputs the right number of elements (or to add 0 or truncate as needed)