using System;
using System.Collections.Generic;
using System.Linq;

namespace HomeWork_201005 {
    internal class Good {
        // вызываем Write(10)
        public static void Write(int max_number) {
            IEnumerable<int> range = Enumerable.Range(1, max_number);
            foreach (int i in range) {
                IEnumerable<int> subRange = i%2 == 0 ? range.Take(i).Reverse() : range.Take(i);
                Console.WriteLine(string.Join("-",
                        Array.ConvertAll(subRange.ToArray(), input => input.ToString())));
            }
        }
    }
}