题解 | #尼科彻斯定理#

public class Main{    public static void main(String[] args)    {        Scanner sc = new Scanner(System.in);        while (sc.hasNext())        {            int n = sc.nextInt();            String[] strs = new String[n];            int k = n*n-n+1;            int j = 0;            for (int i = 0; i < n; i++)            {                strs[i] = String.valueOf(k+j);                j+=2;            }            System.out.println(String.join("+",strs));        }    }}