local n = io.read("*n")
local a = {}
for i = 1, n do
  a[i] = io.read("*n")
end
local p1win = true
for i = 2, n do
  if p1win then
    if 1 < a[i] then
      p1win = true
    else
      p1win = false
    end
  else
    p1win = true
  end
end
print(p1win and "Alice" or "Bob")