def round(x):
    x = int(10*x)
    if x%10>=5:
        x += 10
    return x//10
A,B = map(int,input().split())
ans = 5000
for a in range(1000+1):
    for b in range(1000+1):
        if a+b==0:continue
        if round(100*a/(a+b))==A and round(100*b/(a+b))==B:
            ans = min(ans,a+b)
print(ans)