(define (maxsubseq in)
  (let loop
    ((_sum 0) (_seq (list)) (maxsum 0) (maxseq (list)) (l in))
    (if (null? l)
        (cons maxsum (reverse maxseq))
        (let* ((x (car l)) (sum (+ _sum x)) (seq (cons x _seq)))
          (if (> sum 0)
              (if (> sum maxsum)
                  (loop sum seq    sum    seq (cdr l))
                  (loop sum seq maxsum maxseq (cdr l)))
              (loop 0 (list) maxsum maxseq (cdr l)))))))