题解 | #尼科彻斯定理#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        int m = in.nextInt();
        StringBuilder sb = new StringBuilder();
        int sate = (m * m * m - m * (m - 1)) / m;
        for(int i = 0; i < m ; i++){
            if(i != m - 1){
                sb.append(sate + "+");
            }else if(i == m - 1){
                sb.append(sate);
            }
            sate +=2;
        }
        System.out.println(sb);
        
    }
}