% jot -r 7 11 99 | ./heap
[86 78 18 63 23 26 30]
length: 7
      86
  78      18
63  23  26  30


==== 1 ====
---- sub cnt: 3
      86
  78      18
63  23  26  30

---- sub cnt: 2
      86
  23      18
63  78  26  30

---- sub cnt: 1
      18
  23      86
63  78  26  30

---- sub cnt: 0
      18
  23      86
63  78  26  30


==== 2 ====
---- sub cnt: 3
      30
  23      26
63  78  86
---- sub cnt: 2
      30
  23      26
63  78  86
---- sub cnt: 1
      23
  30      26
63  78  86
---- sub cnt: 0
      23
  30      26
63  78  86

==== 3 ====
---- sub cnt: 2
      86
  30      26
63  78
---- sub cnt: 1
      26
  30      86
63  78
---- sub cnt: 0
      26
  30      86
63  78

==== 4 ====
---- sub cnt: 2
      78
  30      86
63
---- sub cnt: 1
      30
  78      86
63
---- sub cnt: 0
      30
  78      86
63

==== 5 ====
---- sub cnt: 1
  63
78  86

---- sub cnt: 0
  63
78  86


==== 6 ====
---- sub cnt: 1
  78
86
---- sub cnt: 0
  78
86

==== 7 ====
---- sub cnt: 0
86

[18 23 26 30 63 78 86]
      18
  23      26
30  63  78  86