(define (fib n m)
  (define (fib-iter a b p q count)
    (cond ((zero? count) (modulo b m))
          ((even? count)
            (fib-iter a b (modulo (+ (* p p) (* q q)) m) (modulo (+ (* 2 p q) (* q q)) m) (quotient count 2)))
          (else
            (fib-iter (modulo (+ (* b q) (* a q) (* a p)) m) (modulo (+ (* b p) (* a q)) m) p q (- count 1)))))
  (fib-iter 1 0 0 1 n))

(define yuki526 (display (fib (- (read) 1) (read))))