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

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

/rotor {
    5 dict begin
    /delta exch def
    /size exch def
    dup length /len exch def
    /ar exch def
    /ix 0 def
    [
        {
            ix size add len gt {
                exit
            } if
            ar ix size getinterval
            /ix ix size delta add add def
        } loop
    ]
    end
} bind def


% end included library code

/ordergame {
    0 dict begin
    /p exch def
    {
        p length 1 le {
            exit
        } if
        /mm true def
        [
            p 2 -1 rotor {
                aload pop
                mm {
                    min
                } {
                    max
                } ifelse
                /mm mm not def
            } forall
        ] /p exch def
    } loop
    p 0 get
    end
} bind def

(ordergame) test.start
[2 1 4 5 6 3 0 2] ordergame 1 eq test
[0 5 3 2] ordergame 0 eq test
[9 2 1 4 5 6 0 7 3 1 3 5 7 9 0 8] ordergame 2 eq test
test.end