from operator import add, sub
def govno_code(a):
    t = 1
    c = 0
    oper = add
    a += 2
    while t != a:
        c = oper(c, 1)
        if c == 1 or c == t:
            if c == t:
                oper = sub

            if c == 1:
                if t != 1:
                    print c,
                oper = add

            print "\n",
            t += 1

        if t != a:
            print c,


if __name__ == "__main__":
    govno_code(10)