Towers of Hanoi
editable example
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ghul
use IO.Std.write_line
move(disks: int, source: int, target: int, spare: int) -> void =>
if disks > 0 then
move(disks - 1, source, spare, target)
write_line("move a disk from pole {source} to pole {target}")
move(disks - 1, spare, target, source)
fi
move(3, 1, 3, 2)