if n > 0:
    l = list(str(n))
    for i in range(0, len(l)):
        if int(l[i]) < 5:
            l.insert(i, 5)
            break
numbers = [int(x) for x in l]
if n < 0:
    l = list(str(n))
    for i in range(0, len(l)):
        if int(l[i]) > 5:
            l.insert(i, 5)
            break
numbers = [int(x) for x in l]