from decimal import Decimal, ROUND_HALF_UP

a, b = map(int, input().split())

ans = 10000
for i in range(1, 1001):
    for j in range(1, 1001):
        ii = Decimal(str(i))
        jj = Decimal(str(j))
        ra = 100 * ii / (ii + jj)
        rb = 100 * jj / (ii + jj)
        ra = ra.quantize(Decimal('0'), rounding=ROUND_HALF_UP)
        rb = rb.quantize(Decimal('0'), rounding=ROUND_HALF_UP)
        if ra == a and rb == b:
            ans = min(ans, i + j)
print(ans)