n = int(input())
if n == 0:
    print('1')
elif n == 1:
    print('010')
else:
    if n % 2 == 0:
        k = n // 2
        s = '0' * k + '1001' + '0' * k
    else:
        k = (n - 1) // 2
        s = '0' * (k + 1) + '1001' + '0' * k
    print(s)