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

ANS=1<<60

def rou(x):
    k=int(x)
    if k+1-x<=x-k:
        return k+1
    else:return k

for a in range(1000):
    for b in range(1000):
        if a+b==0:
            continue
        if rou(100*a/(a+b))==A and rou(100*b/(a+b))==B:
            ANS=min(ANS,a+b)

print(ANS)