The determinant of a matrix

Question

https://code.sololearn.com/cr4TJ12tmovk/#py
This is my first program. I suppose it looks easy.
How I can add "input" function there?
Could you give me some advice, please? Some fixes?

Answer 1

a = []
n = int(input('Input number of rows: '))
k = int(input('Input number of columns: '))
for i in range(k):
a.append([])
for j in range(n):
a[i].append(int(input()))
print(a)

Answer 2

the code is good and it's no problem without it
it's determinant for third order matrix