a,b=map(int,input().split())
round=lambda x:(x*2+1)//2
s=[]
for i in range(0,301):
    for j in range(0,301):
        if i!=0 or j!=0:
            if round(100*i/(i+j))==a and round(100*j/(i+j))==b:
                s.append(i+j)
print(min(s))