31 lines
589 B
Perl
31 lines
589 B
Perl
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read_file(Stream, []) :-
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at_end_of_stream(Stream).
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read_file(Stream, [X|L]) :-
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\+ at_end_of_stream(Stream),
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read_line_to_codes(Stream, C),
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atom_chars(A, C),
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read_file(Stream, L),
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atom_number(A, X).
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main :-
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open('../input/01', read, Stream),
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read_file(Stream, Lines), !,
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close(Stream),
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step(Lines, N),
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print(N).
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step([], 0).
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step([A|Tail], B) :-
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step_(A, Tail, B).
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step_(_, [], 0).
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step_(A, [B|Tail], Res) :-
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A < B,
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step_(B, Tail, TailRes),
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Res is TailRes + 1.
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step_(A, [B|Tail], Res) :-
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A >= B,
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step_(B, Tail, Res).
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