A, B = map(int, input().split())

ANS = 10**10
for i in range(101):
    for j in range(101):
        if not (i==0 and j == 0):
            a = int(100*i/(i+j) +0.5)
            b = int(100*j/(i+j) +0.5)
            if A== a and B==b:
                ANS = min(ANS, i+j)
                # print(ANS, i, j)

print(ANS)