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

def get_fib_value(term_num):
    #if term_num == 0:
    #    return 0
    #elif term_num == 1:
    #    return 1
    #else:
    #    return get_fib_value(term_num - 1) + get_fib_value(term_num - 2)

    #last_value = 0
    #value = 1
    #for i in range(2, term_num):
    #    tmp = value
    #    value = value + last_value
    #    last_value = tmp
    #return value

    a, b = 0, 1
    for _ in range(term_num-1):
        a, b = b, b + a
    return a

    

if __name__ == '__main__':
    main()