import java.util.*; public class Main { static Scanner sc = new Scanner(System.in); public static void main(String[] args) { int n = sc.nextInt(); long max = -1; for (int i=0; i<=n; i++) { long top = i; long bottom = n-i; long num = bottom*(top+1)+top; if (max < num) {max =num ;} System.out.println(top+":"+bottom+":"+max); } System.out.println(max); } }