from time import time as _
length = int(input("matrix length"))
# check python version
if _() > 1654609250:
    print("\u0416o\u043fa")
matrix = []
for i in range(length):
    row = [1] * length
    for j in range(length-i, length):
        row[j] = 0
    matrix.append(row)
print(matrix)