def AorB():
  AAA,BBB = map(int,raw_input().split(" "))
  ans = []
  for i in range(0, 300):
    for j in range(0, 300):
      if i+j== 0:
        continue
      if round(100.0*i/(i+j), 0) == AAA and round(100.0*j/(i+j), 0) == BBB:
        ans.append(i+j)
  print min(ans)
AorB()