I did 3 Python questions for 3 days. I wonder how to solve it.

n = int(input())
li = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
for i in range(0, n*n):
    if i % n == 3:
        print(li[i % 10])
    else:
        print(li[i % 10], end='')