diff --git a/03/03.rs b/03/03.rs new file mode 100644 index 0000000..3034dde --- /dev/null +++ b/03/03.rs @@ -0,0 +1,32 @@ +use std::fs; + +fn count(field: &Vec>, dx: usize, dy: usize) -> usize { + let mut x = 0; + let mut y = 0; + let mut count = 0; + while y < field.len() { + if field[y][x] == '#' { + count += 1; + } + x = (x + dx) % field[0].len(); + y += dy; + } + return count; +} + +fn main() { + let contents = fs::read_to_string("input").unwrap(); + let mut field: Vec> = vec![]; + for line in contents.lines() { + field.push(line.chars().collect()); + } + println!( + "{} {}", + count(&field, 3, 1), + count(&field, 1, 1) + * count(&field, 3, 1) + * count(&field, 5, 1) + * count(&field, 7, 1) + * count(&field, 1, 2) + ) +} diff --git a/03/input b/03/input new file mode 100644 index 0000000..a11fc85 --- /dev/null +++ b/03/input @@ -0,0 +1,323 @@ +.........#.#.#.........#.#..... +...#......#...#.....#.....#.... +#.....#.....#.....#.#........#. +......#..#......#.......#...... 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