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# Advent of Code 2020, day 5: Binary Boarding
## Setup
```elixir
file_path = __DIR__ <> "/../../lib/2020/05_binary_boarding/input.txt"
```
## Parse data
```elixir
data =
File.read!(file_path)
|> String.replace("F", "0")
|> String.replace("B", "1")
|> String.replace("L", "0")
|> String.replace("R", "1")
|> String.split("\n", trim: true)
|> Enum.map(&String.to_integer(&1, 2))
```
## Part 1
```elixir
part1 = Enum.max(data)
```
## Part 2
```elixir
all_seats = Enum.min(data)..Enum.max(data) |> MapSet.new()
tickets = data |> MapSet.new()
part2 = MapSet.difference(all_seats, tickets) |> MapSet.to_list() |> hd
```
## Confirm final result
```elixir
928 = part1
610 = part2
"🥳"
```
See source 
