题解 | #尼科彻斯定理#

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.temporal.ChronoUnit;
import java.util.*;
import java.util.stream.IntStream;
import java.util.stream.Stream;

import static java.util.stream.Stream.*;


public class Main {
    public static void main(String[] args) throws IOException {

        //testCompletePack();
        testTh();
    }

    private static void testTh() throws IOException {
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        String str;
        while ((str = bf.readLine()) != null) {
            int parseInt = Integer.parseInt(str);
            double pow = Math.pow(parseInt, 3);
            int res = 0;
            int i = 1;
            int temp = 1;
            String te = "";
            while (res != pow) {
                res = 0;
                StringJoiner sj = new StringJoiner("+");
                for (int j = 1; j <= parseInt ; j++) {
                    res = i + res;
                    sj.add(i + "");
                    i = i + 2;
                }
                temp = temp + 2;
                i = temp;
                te = sj.toString();
            }
            System.out.println(te);



        }

    }




}