# 苦手なタイプかなも
# 周期を探すのか、式変形なのか
# まず実験してみよう

A, B = map(float, input().split())
for ab in range(1, 10**4):
    for a in range(ab+1):
        b = ab-a
        #print(ab, a, b, round(100*a/(a+b)), round(100*b/(a+b)))
        if (A-0.5)*ab <= 100*a < (A+0.5)*ab and (B-0.5)*ab <= 100*b < (B+0.5)*ab:
            #print(ab, a, b)
            print(ab)
            exit()