A, B = map(int, input().split())
ansl = []
for a in range(0, 1001):
    for b in range(0, 1001):
        if a == b == 0:
            continue
        sho1, amari = divmod(100*a, a + b)
        if amari*2 >= a + b:
            sho1 += 1

        sho2, amari = divmod(100*b, a + b)
        if amari*2 >= a + b:
            sho2 += 1

        if sho1 == A and sho2 == B:
            ansl.append(a + b)
    
print(min(ansl))