A,B = map(int,input().split())
ans = 10**10
for i in range(2000):
    for j in range(2000):
        if i+j>0 and A-0.5<=100*i/(i+j)<A+0.5 and B-0.5<=100*j/(i+j)<B+0.5:
            ans = min(ans,i+j)
print(ans)