%!PS

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

/minmax {
    0 dict begin
    /a exch def
    /l a dup length 1 sub  get def
    /h l def
    0 2 a length 2 sub {
        /i exch def
        a i get a i 1 add get
        2 copy gt {
            exch
        } if
        h max /h exch def
        l min /l exch def
    } for
    [ l h ]
    end
} 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

/maxdistance {
    minmax exch
    minmax
    aload pop
    3 -1 roll
    aload pop
    4 1 roll
    sub
    3 1 roll
    sub
    max
} bind def

(maxdistance) test.start
[4 5 7] [9 1 3 4] maxdistance 6 eq test
[2 3 5 4] [3 2 5 5 8 7] maxdistance 6 eq test
[2 1 11 3] [2 5 10 2] maxdistance 9 eq test
[1 2 3] [3 2 1] maxdistance 2 eq test
[1 0 2 3] [5 0] maxdistance 5 eq test
test.end