(define (fast-fibo i m)
  (define (helper n)
    (if (zero? n)
      (values 0 1)
      (let-values
        (((a b) (helper (quotient n 2))))
        (if (even? n)
          (values (modulo (* a (- (* 2 b) a)) m)
                  (modulo (+ (* a a) (* b b)) m))
          (values (modulo (+ (* a a) (* b b)) m)
                  (modulo (* b (+ (* 2 a) b)) m))))))
  (values-ref helper 0))

(define yuki526 (display (fast-fibo (- (read) 1) (read))))