def fib_rec(a, b, p, q, count, m)
  if count == 0
    return b % m
  elsif count.even?
    fib_rec(a, b, (p * p + q * q) % m, (2 * p * q + q * q) % m, count // 2, m)
  else
    fib_rec((b * q + a * q + a * p) % m, (b * p + a * q) % m, p, q, count - 1, m)
  end
end

def fib(n, m)
  fib_rec(1, 0, 0, 1, n, m)
end

def main
  n, m = read_line.split.map(&.to_u64)
  puts fib(n - 1, m)
end

main