Function advent_solutions::advent2017::day09::part1

pub fn part1(root: &Node) -> usize

Your goal is to find the total score for all groups in your input. Each group is assigned a score which is one more than the score of the group that immediately contains it. (The outermost group gets a score of 1.)

• {}, score of 1.

  let root = Node::from_bytes(b"{}")
      .to_result()
      .unwrap();
  
  assert_eq!(part1(&root), 1);

• {{{}}}, score of 1 + 2 + 3 = 6.

  let root = Node::from_bytes(b"{{{}}}")
      .to_result()
      .unwrap();
  
  assert_eq!(part1(&root), 6);

• {{},{}}, score of 1 + 2 + 2 = 5.

  let root = Node::from_bytes(b"{{},{}}")
      .to_result()
      .unwrap();
  
  assert_eq!(part1(&root), 5);

• {{{},{},{{}}}}, score of 1 + 2 + 3 + 3 + 3 + 4 = 16.

  let root = Node::from_bytes(b"{{{},{},{{}}}}")
      .to_result()
      .unwrap();
  
  assert_eq!(part1(&root), 16);

• {<a>,<a>,<a>,<a>}, score of 1.

  let root = Node::from_bytes(b"{<a>,<a>,<a>,<a>}")
      .to_result()
      .unwrap();
  
  assert_eq!(part1(&root), 1);

• {{<ab>},{<ab>},{<ab>},{<ab>}}, score of 1 + 2 + 2 + 2 + 2 = 9.

  let root = Node::from_bytes(b"{{<ab>},{<ab>},{<ab>},{<ab>}}")
      .to_result()
      .unwrap();
  
  assert_eq!(part1(&root), 9);

• {{<!!>},{<!!>},{<!!>},{<!!>}}, score of 1 + 2 + 2 + 2 + 2 = 9.

  let root = Node::from_bytes(b"{{<!!>},{<!!>},{<!!>},{<!!>}}")
      .to_result()
      .unwrap();
  
  assert_eq!(part1(&root), 9);

• {{<a!>},{<a!>},{<a!>},{<ab>}}, score of 1 + 2 = 3.

  let root = Node::from_bytes(b"{{<a!>},{<a!>},{<a!>},{<ab>}}")
      .to_result()
      .unwrap();
  
  assert_eq!(part1(&root), 3);

What is the total score for all groups in your input?