2023-14: Implement part one

input/2023/day_14/input.txt

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input/2023/day_14/input_test.txt

@@ -0,0 +1,10 @@
+O....#....
+O.OO#....#
+.....##...
+OO.#O....O
+.O.....O#.
+O.#..O.#.#
+..O..#O..O
+.......O..
+#....###..
+#OO..#....

src/year_2023/day_14_parabolic_reflector_dish/common.rs

@@ -0,0 +1,20 @@
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum Rock {
+    R, // Round
+    S, // Square
+    N, // None
+}
+
+#[allow(dead_code)]
+pub fn print_platform(platform : &Vec<Vec<Rock>>) {
+    for row in platform.clone() {
+        for c in row {
+            match c {
+                Rock::R => print!("O"),
+                Rock::S => print!("#"),
+                Rock::N => print!("."),
+            }
+        }
+        print!("\n");
+    }
+}

src/year_2023/day_14_parabolic_reflector_dish/mod.rs

@@ -0,0 +1,25 @@
+pub mod part_one;
+pub mod part_two;
+pub mod common;
+
+use crate::utils::solution::Solution;
+use crate::utils::input_reader;
+
+pub struct DaySolution ;
+
+
+impl Solution for DaySolution {
+
+    fn input_path(&self) -> &'static str {
+        "input/2023/day_14/input.txt"
+    }
+
+    fn part_one(&self) -> String {
+        input_reader::read_input_file(self.input_path(), part_one::part_one)
+    }
+
+    fn part_two(&self) -> String {
+        input_reader::read_input_file(self.input_path(), part_two::part_two)
+        // String::from("Not implemented")
+    }
+}

src/year_2023/day_14_parabolic_reflector_dish/part_one.rs

@@ -0,0 +1,54 @@
+use super::common::Rock;
+
+pub fn part_one(input_lines: Vec<String>) -> String {
+
+    let mut platform: Vec<Vec<Rock>> = Vec::new();
+
+    for line in input_lines {
+        let mut row: Vec<Rock> = Vec::new();
+        for c in line.chars() {
+            match c {
+                '.' => row.push(Rock::N),
+                '#' => row.push(Rock::S),
+                'O' => row.push(Rock::R),
+                _ => panic!("Invalid character: {}", c),
+            }
+        }
+
+        platform.push(row);
+    }
+
+    tilt(&mut platform);
+
+    let result = count_load(&platform);
+    result.to_string()
+
+    // String::from("Not implemented")
+}
+
+fn tilt(platform : &mut Vec<Vec<Rock>>) {
+    for i in 0..platform.len() {
+        for j in 0..platform[i].len() {
+            if platform[i][j] == Rock::R {
+                let mut k = i;
+                while k >= 1 && platform[k - 1][j] == Rock::N {
+                    k -= 1;
+                }
+                platform[i][j] = Rock::N;
+                platform[k][j] = Rock::R;                    
+            }
+        }
+    }
+}
+
+fn count_load(platform : &Vec<Vec<Rock>>) -> usize {
+    let mut count = 0;
+    for i in 0..platform.len() {
+        for j in 0..platform[i].len() {
+            if platform[i][j] == Rock::R {
+                count += platform.len() - i;
+            }
+        }
+    }
+    count
+}

src/year_2023/mod.rs

@@ -11,6 +11,7 @@ pub mod day_10_pipe_maze;
 pub mod day_11_cosmic_expantion;
 pub mod day_12_hot_springs;
 pub mod day_13_point_of_incidence;
+pub mod day_14_parabolic_reflector_dish;
 
 pub fn run(day: &str) {
     let solution: Box<dyn Solution> = match day {
@@ -25,6 +26,7 @@ pub fn run(day: &str) {
         "11" => Box::new(day_11_cosmic_expantion::DaySolution),
         "12" => Box::new(day_12_hot_springs::DaySolution),
         "13" => Box::new(day_13_point_of_incidence::DaySolution),
+        "14" => Box::new(day_14_parabolic_reflector_dish::DaySolution),
         _ => panic!("Invalid day specified"),
     };