%!PS

% begin included library code
% see https://codeberg.org/Firedrake/postscript-libraries/
/apop.left { % [a b c] -> [b c] a
    dup 0 get exch
    [ exch aload length -1 roll pop ] exch
} bind def

/test.start {
    print (:) print
    /test.pass 0 def
    /test.count 0 def
} bind def

/test.end {
    ( ) print
    test.count 0 gt {
        (Passed ) print
        test.pass (...) cvs print
        (/) print
        test.count (...) cvs print
        ( \() print
        test.pass 100 mul test.count idiv (...) cvs print
        (%\)) print
        (\r\n) print
    } if
} bind def

/apush.right { % [a b] c -> [a b c]
    exch
    [ exch aload length 2 add -1 roll ]
} bind def

/test {
    /test.count test.count 1 add def
    {
        /test.pass test.pass 1 add def
    } {
        ( ) print
        test.count (....) cvs print
        (-fail) print
    } ifelse
} bind def


% end included library code

/wordbreak {
    0 dict begin
    /words exch def
    /a exch def
    /queue [ a ] def
    false
    {
        queue length 1 lt {
            exit
        } if
        queue apop.left /remnant exch def /queue exch def
        remnant length 0 eq {
            pop true
            exit
        } if
        words {
            /candidate exch def
            remnant candidate anchorsearch {
                pop pop
                /queue queue
                remnant
                candidate length
                remnant length candidate length  sub
                getinterval
                apush.right def
            } {
                pop
            } ifelse
        } forall
    } loop
    end
} bind def

(wordbreak) test.start
(weeklychallenge) [(challenge) (weekly)] wordbreak test
(perlrakuperl) [(raku) (perl)] wordbreak test
(sonsanddaughters) [(sons) (sand) (daughters)] wordbreak not test
test.end