P, Q = map(int, input().split())
LR=P/Q
L = 0
R = 0
qL, pL, pR, qR = 0, 0, 0, 0
minR = 100000
maxL = 0
for p in range(1, 2):
    for q in range(1, Q):
        RL = p/q
        if RL<LR:
            if RL>maxL:
                maxL = RL
                pL, qL= p, q
        else:
            if RL<minR:
                minR = RL
                pR, qR = p, q
print(pL+qL+pR+qR)