## https://yukicoder.me/problems/no/526


def main():
    N, M = map(int, input().split())

    c = 0
    d = 1
    ans = 0
    for _ in range(2, N):
        ans = (c + d) % M
        c = d
        d = ans
    
    print(ans)









if __name__ == "__main__":
    main()