дм.2

import copy
a,b = map(int,input().split())
A = [0 for i in range(b)]
B =[]

for i in range(a):
    for j in range(b):
        if (j + i) % 2 == 1:
            A[j] = 1
        else:
            A[j] = 0
    p = copy.deepcopy(A)
    B.append(p)
for i in range(a):
    for j in range(b):
        print(B[i][j], end = ' ')
    print()