дм.3

a = int(input())
for i in range(a):
    for j in range(a):
        if i % 2 == 0 and j % 2 == 0:
            if  i == 0  or i == a-1 or j == 0 or j == a -1:
                print(0,end = ' ')
            else:
                print(1,end = ' ')
        else:
            print(1 , end = ' ')
    print()