1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
n=100

plansza=[['0']*n for i in range(n)]

for j in range(1,n):
    plansza[0][j]='1'

for i in range(1,n):
    if i%2==1:
        plansza[i][0]='1'
    else:
        for j in range(n-1):
            plansza[i][j]='1'

for i in range(n):
    print(''.join(plansza[i]))