exercise1.rb

# Exercise 1

# (3 5 4 1)
# |7 9 6 8|


# (1) _  _  _ - Tick 1

# |8| (1) _ _ - Tick 2

# (4) |8| (1) _ - Tick 3

# |6| (4) |8| (1)  - Tick 4

# (5) |6| (1,4) |8| - Tick 5

# |9| (1,5) |6,8| (4) - Tick 6

# (1,3) |6,9| (4,5) |8| - Tick 7

# |6,7| (3,4) |8,9| (5) - Tick 8 - (1) |_|

# (3) |7,8| (4,5) |9| - Tick 9 - (1) |6|

# |7| (4) |8,9| (5) - Tick 10 - (1,3) |6|

# (4) |8| (5) |9| - Tick 11 - (1,3) |6,7|

# |8| (5) |9| _ - Tick 12 - (1,3,4) |6,7|

# (5) |9| _ _ - Tick 13 - (1,3,4) |6,7,8|

# |9| _  _ _ - Tick 14 - (1,3,4,5) |6,7,8|

# _ _ _ _ - Tick 15 - (1,3,4,5) |6,7,8,9|