# frozen_string_literal: true

n, m = gets.chomp.split.map(&:to_i)

def fib_mod(num, mod)
  i = 0
  b = 1
  c = 0
  while i < num
    a = b
    b = c
    c = (a + b) % mod
    i += 1
  end
  c
end
# ref: https://ja.wikipedia.org/%
#           wiki/%E3%83%95%E3%82%A3%E3%83%9C%E3%83%8A%E3%83%83%E3%83%81%E6%95%B0
#      https://yukicoder.me/submissions/246039

p fib_mod(n - 1, m)