# 式変形してみたけどピンと来ない
# a+b, aで全探索してみるか

from math import floor, ceil
A, B = map(int, input().split())
for ab in range(1, 10000):
    a_lower = ab*(A-0.5)/100
    a_upper = ab*(A+0.5)/100
    for a in range(floor(a_lower), ceil(a_upper)+1):
        b = ab-a
        if b >= 0:
            if (A-0.5)*ab <= 100*a < (A+0.5)*ab:
                if (B-0.5)*ab <= 100*b < (B+0.5)*ab:
                    print(ab)
                    exit()