P, Q = map(int, input().split())
LR=P/Q
minRL = 1000000
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):
        R = p/q
        L = p/q
        if L>maxL and L<(P/Q):
            maxL = L
            pL, qL= p, q
        if R<minR and (P/Q)<R:
            minR = R
            pR, qR = p, q
print(pL+qL+pR+qR)