# -*- coding: utf-8 -*-
"""
No.526 フィボナッチ数列の第N項をMで割った余りを求める
https://yukicoder.me/problems/no/526
"""
import sys
from sys import stdin
input = stdin.readline


Memo = [-1, 0, 1]
def modfibo(N, M):
    global Memo
    if N <= len(Memo):
        return Memo[N]
    else:
        for i in range(len(Memo), N+1):
            Memo.append((Memo[-2] + Memo[-1])%M)
    return Memo[N]



def main(args):
    N, M = map(int, input().split())
    ans = modfibo(N, M)
    print(ans)


if __name__ == '__main__':
    main(sys.argv[1:])