using System;
using System.Collections.Generic;

public class Program
{
  public static IEnumerable<int[]> FindCombosRec(int[] buffer, int done, int begin, int end)
  {
    for (int i = begin; i < end; i++)
    {
      buffer[done] = i;

      if (done == buffer.Length - 1)
        yield return buffer;
      else
        foreach (int[] child in FindCombosRec(buffer, done+1, i+1, end))
          yield return child;
    }
  }

  public static IEnumerable<int[]> FindCombinations(int m, int n)
  {
    return FindCombosRec(new int[m], 0, 0, n);
  }

  static void Main()
  {
    foreach (int[] c in FindCombinations(3, 5))
    {
      for (int i = 0; i < c.Length; i++)
      {
        Console.Write(c[i] + " ");
      }
      Console.WriteLine();
    }
  }
}