local band = bit.band
local mmi, mma = math.min, math.max
local n, k = io.read("*n", "*n")
-- 2^a + n - (2^a - 1) <= k
if n < k then print("INF")
else
  local c = 0
  for x = 0, 131071 do
    local ymin = mma(0, x - k)
    for y = ymin, x do
      if band(x, y) == n then c = c + 1 end
    end
  end
  print(c)
end