%!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

/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

/removeone {
    0 dict begin
    /a exch def
    /ec 0 def
    /lx 0 def
    true
    0 1 a length 2 sub {
        a exch 2 getinterval /s exch def
        s 1 get s 0 get le {
            /ec ec 1 add def
            ec 1 gt s 0 get s 1 get sub lx ge or {
                pop false
                exit
            } if
        } if
        /lx s 1 get s 0 get sub def
    } for
    end
} bind def

(removeone) test.start
[0 2 9 4 6] removeone test
[5 1 3 2] removeone not test
[2 2 2] removeone not test
test.end