%!PS

% begin included library code
% see https://codeberg.org/Firedrake/postscript-libraries/
/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

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

/apop.left { % [a b c] -> [b c] a
    dup 0 get exch
    [ exch aload length -1 roll pop ] exch
} bind def


% end included library code

/boxcoins {
    8 dict begin
    /mx 0 def
    /stack exch [ exch [ exch 0 ] ] def
    {
        stack length 0 eq {
            exit
        } if
        stack apop.left /x exch def /stack exch def
        /t x 0 get def
        /tot x 1 get def
        tot mx gt {
            /mx tot def
        } if
        0 1 t length 1 sub {
            /i exch def
            /p t i get def
            i 0 gt {
                /p p t i 1 sub get mul def
            } if
            i t length 1 sub lt {
                /p p t i 1 add get mul def
            } if
            /stot tot p add def
            stack
            [
                [
                    0 1 t length 1 sub {
                        /ix exch def
                        i ix ne {
                            t ix get
                        } if
                    } for
                ]
                stot
            ]
            apush.right /stack exch def
        } for
    } loop
    mx
    end
} bind def

(boxcoins) test.start
[3 1 5 8] boxcoins 167 eq test
[1 5] boxcoins 10 eq test
test.end