#[test]
    fn test_y2025_day7_part2() {
        let input = include_str!("../../input/2025/day_7.txt");
        let mut rows = input
            .lines()
            .map(|l| {
                l.chars()
                    .map(|c| match c {
                        'S' | '|' => 1isize,
                        '^' => -1isize,
                        _ => 0isize,
                    })
                    .collect::<Vec<isize>>()
            })
            .collect::<Vec<Vec<isize>>>();
        let width = rows[0].len();
        for i in 1..rows.len() {
            for j in 0..width {
                if rows[i - 1][j] >= 1 {
                    if rows[i][j] == -1 {
                        rows[i][j - 1] += rows[i - 1][j];
                        rows[i][j + 1] += rows[i - 1][j];
                    } else {
                        rows[i][j] += rows[i - 1][j];
                    }
                }
            }
        }
        print_tree(&rows);
        let total: isize = rows.pop().unwrap().iter().sum();
        println!("Total: {}", total);
    }