5 (0, 0)
11 (1, 1)
 13 (1, 0)
1 (2, 3)
 16 (2, 2)
  18 (2, 1)
   19 (2, 0)
  17 (2, 0)
 15 (2, 1)
  20 (2, 0)
 10 (2, 0)

1
5 (0, 1)
 10 (0, 0)
11 (1, 3)
 16 (1, 2)
  18 (1, 1)
   19 (1, 0)
  17 (1, 0)
 15 (1, 1)
  20 (1, 0)
 13 (1, 0)

5
10 (0, 0)
11 (1, 3)
 16 (1, 2)
  18 (1, 1)
   19 (1, 0)
  17 (1, 0)
 15 (1, 1)
  20 (1, 0)
 13 (1, 0)

10
11 (0, 3)
 16 (0, 2)
  18 (0, 1)
   19 (0, 0)
  17 (0, 0)
 15 (0, 1)
  20 (0, 0)
 13 (0, 0)

11
13 (0, 0)
15 (1, 1)
 20 (1, 0)
16 (2, 2)
 18 (2, 1)
  19 (2, 0)
 17 (2, 0)

13
15 (0, 1)
 20 (0, 0)
16 (1, 2)
 18 (1, 1)
  19 (1, 0)
 17 (1, 0)

15
20 (0, 0)
16 (1, 2)
 18 (1, 1)
  19 (1, 0)
 17 (1, 0)

16
17
18
19
20
Heap is empty.
Heap is empty.