28 lines
684 B
Prolog
28 lines
684 B
Prolog
:- use_module(library(pio)).
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:- use_module(library(clpfd)).
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:- initialization(main, main).
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main([FileName|_]) :-
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input(FileName, Input),
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hashes(Input, Hash),
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writef('Answer=%t\n', [Hash]).
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hashes(Strs, Hash) :-
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concurrent_maplist(reverse, Strs, RStrs),
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concurrent_maplist(hash, RStrs, Hashes),
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sum_list(Hashes, Hash).
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hash([], 0).
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hash([C|Str], Hash) :- hash(Str, Prev), Hash is (Prev + C)*17 mod 256.
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% Input stuff
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input(FileName, Input) :- phrase_from_file(string(Input), FileName).
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string([]) --> (eos; "\n"), !.
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string([Item|Items]) --> item(Item), string(Items).
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item([]) --> (","; "\n"; eos), !.
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item([C|Chars]) --> [C], item(Chars).
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eos([], []).
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