N, M = list(map(int, input().split()))
F = {0: 0, 1: 1}

for i in range(2,N):
    temp = F[i-1] + F[i-2]
    if temp == M and F[i-1] == 1:
        mod_n = N % i
        print(F[mod_n])
        exit()
    elif temp >= M:
        F[i] = temp - M
    else:
        F[i] = temp
else:
    print(F[N-1])