R,B = map(int,input().split())
l = 1
r = 2000000
while r - l > 1:
  k = (l + r) // 2
  f = 1
  RR,BB = min(R,B),max(R,B)
  for kk in range(k,0,-1):
    if BB < kk*kk:
      f = 0
      break
    BB -= kk*kk
    if BB < RR:
      RR,BB = BB,RR
  if f:
    l = k
  else:
    r = k
print(l)