(define yuki2815
  (let* ((n (read))
         (ax (make-u32vector n)))
    (dotimes (i n) (u32vector-set! ax i (read)))
    (let loop-right ((r 0))
      (if (and (< (+ r 1) n) (<= (u32vector-ref ax (+ r 1)) (u32vector-ref ax r)))
        (loop-right (+ r 1))
        (let loop-left ((l r))
          (if (and (< 0 l) (equal? (u32vector-ref ax r) (u32vector-ref ax (- l 1))))
            (loop-left (- l 1))
            (print (- (+ r 1) l))))))))