Story

Old MacDingle had a farm.

It was a free-range chicken farm with a fox problem, as we learned earlier:

So old MacDingle decided to lay fox bait around the farm to poison the foxes.

Foxes F eat chickens C

When foxes eat fox bait X they die.

Fox bait is harmless to chickens.

Chickens in cages [] are safe (unless a fox has got into the cage with them!)

Kata Task

Given the initial configuration of foxes and chickens what will the farm look like the next morning after the hungry foxes have been feasting?

Ex1 - chickens outside cages when foxes about	Before	CCC[CCC]FCC[CCCCC]CFFFF[CCC]FFFF
Ex1 - chickens outside cages when foxes about	After	...[CCC]F..[CCCCC].FFFF[CCC]FFFF
Ex2 - a fox in a chicken cage	Before	...[CCC]...[CCCFC].....[CCC]....
Ex2 - a fox in a chicken cage	After	...[CCC]...[...F.].....[CCC]....
Ex3 - foxes are poisoned	Before	CCCCC...XCCCCCCCCC....FFF.X..CF
Ex3 - foxes are poisoned	After	CCCCC...X.................X....
Ex4 - a bit of everything	Before	...CC...X...[CCC]CCC[CCCXCCCF]CCCC[CFC]FCC
Ex4 - a bit of everything	After	...CC...X...[CCC]...[CCCX....]....[.F.]...

Anything not a fox, a chicken, fox bait, or a cage is just dirt .
All cages are intact (not open-ended), and there are no cages inside other cages
The same fox bait can kill any number of foxes
A hungry fox will always eat as many chickens as he can get to, before he is tempted by the bait
Foxes can jump over cages to get to chickens/bait on the other side

Strings

Algorithms

Check out these other kata created by dinglemouse

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