> Sample Output 1
> 2
> 1 1 2
> 1 1 1
> 
> The limitations are:1 ≤ pos1 ≤ n, 1 ≤ length ≤ n+1-pos1, 0 ≤ pos2 ≤ n-length
> 
> but in the first case, pos2(with the value 2) is invalid?
> 
n=3, pos2=2 <= n-1