package com.example.demo.simple;
import java.util.Scanner;
public class Main_39 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int nextInt = sc.nextInt();
int startNum = nextInt * (nextInt - 1) + 1;
for (int i = 0; i < nextInt; i++) {
System.out.print((i == nextInt - 1)? startNum : startNum + "+");
startNum = startNum + 2;
}
System.out.println();
}
}

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