what is test5 look like?

Stacked at this point too. Found that following example crashes my structure for a looooong time to think:
2222223222222222322222222222322222222232222222222232222222223222222222223222222222322222
5
a
aa
afa
aaaa
aafaa

answer should be like "aaaa aafaa aaaa aafaa etc..."

Thanks for this example. My backtracking solution also is way too slow.

Yes. A very nice benchmark.

Edited by author 03.05.2015 16:52

Edited by author 03.05.2015 16:53

aaaa aafaa aa aaaa afa aaaa aaaa aafaa aa aaaa afa aaaa aaaa aafaa aa aaaa afa aaaa aaaa aafaa aa aaaa afa aaaa

Very nice test, I understand, because my program is too slowly.