add rust solutions for days 1-7,9,11,12

Day-01/rust/duckulus/day01.rs

@@ -0,0 +1,53 @@
+use crate::common::{InputType, read_lines};
+
+const DAY: usize = 1;
+
+pub fn part_one(input_type: InputType) {
+    let lines = read_lines(DAY, &input_type);
+    let mut dial = 50;
+    let mut password = 0;
+    for line in lines {
+        let direction = if &line.as_str()[..1] == "L" { -1 } else { 1 };
+        dial += direction * line.as_str()[1..].parse::<i32>().unwrap();
+        dial = dial % 100;
+        while dial < 0 {
+            dial = 100 + dial
+        }
+        if dial == 0 {
+            password += 1;
+        }
+    }
+    println!("{}", password);
+}
+
+pub fn part_two(input_type: InputType) {
+    let lines = read_lines(DAY, &input_type);
+    let mut dial = 50;
+    let mut password = 0;
+    for line in lines {
+        let direction = if &line.as_str()[..1] == "L" { -1 } else { 1 };
+        let change = line.as_str()[1..].parse::<i32>().unwrap();
+
+        if direction == -1 {
+            let t = dial;
+            dial -= change;
+            if dial < 0 && t == 0 {
+                password -= 1;
+            }
+            while dial < 0 {
+                dial = 100 + dial;
+                password += 1;
+            }
+            if dial == 0 {
+                password += 1;
+            }
+        } else {
+            dial += change;
+            if dial >= 100 {
+                password += dial / 100;
+                dial = dial % 100;
+            }
+        }
+    }
+    println!("{}", password);
+}

Day-02/rust/duckulus/day02.rs

@@ -0,0 +1,62 @@
+use crate::common::{InputType, read_input};
+use std::ops::{Range, RangeInclusive};
+
+const DAY: usize = 2;
+
+pub fn part_one(input_type: InputType) {
+    let ranges = read_ranges(input_type);
+
+    let mut sum = 0;
+    for range in ranges {
+        for i in range {
+            let s = i.to_string();
+            let str = s.as_str();
+            let len = str.len();
+
+            if len % 2 != 0 {
+                continue
+            }
+
+            if str[..len / 2] == str[len / 2..] {
+                sum += i;
+            }
+        }
+    }
+    println!("{}", sum);
+}
+
+pub fn part_two(input_type: InputType) {
+    let ranges = read_ranges(input_type);
+
+    let mut sum = 0;
+    for range in ranges {
+        for i in range {
+            let s = i.to_string();
+            let str = s.as_str();
+            let len = str.len();
+            for pref in 1..=len / 2 {
+                if len % pref != 0 {
+                    continue;
+                }
+                let reps = len / pref;
+                if str[..len / reps].repeat(reps) == str {
+                    sum += i;
+                    break;
+                }
+            }
+        }
+    }
+    println!("{}", sum);
+}
+
+fn read_ranges(input_type: InputType) -> Vec<RangeInclusive<u64>> {
+    let ranges: Vec<_> = read_input(DAY, &input_type)
+        .as_str()
+        .split(",")
+        .map(|s| {
+            let split: Vec<_> = s.split("-").collect();
+            split[0].trim().parse::<u64>().unwrap()..=split[1].trim().parse::<u64>().unwrap()
+        })
+        .collect();
+    ranges
+}

Day-03/rust/duckulus/day03.rs

@@ -0,0 +1,51 @@
+use crate::common::{InputType, read_input};
+
+const DAY: usize = 3;
+
+pub fn part_one(input_type: &InputType) {
+    let value: u64 = get_banks(input_type)
+        .into_iter()
+        .map(|bank| max_joltage(bank, 2, 0))
+        .sum();
+    println!("{}", value)
+}
+
+pub fn part_two(input_type: &InputType) {
+    let value: u64 = get_banks(&input_type)
+        .into_iter()
+        .map(|bank| max_joltage(bank, 12, 0))
+        .sum();
+    println!("{}", value)
+}
+
+fn max_joltage(bank: Vec<u8>, digits: usize, start: usize) -> u64 {
+    if digits == 0 {
+        return 0;
+    }
+    let mut max = bank[start];
+    let mut maxi = start;
+    for i in start + 1..=bank.len() - digits {
+        if bank[i] > max {
+            max = bank[i];
+            maxi = i;
+        }
+    }
+
+    let current_digit_value = (bank[maxi] as u64) * 10u64.pow((digits-1) as u32);
+    let remaining_digits_value = max_joltage(bank, digits - 1, maxi + 1);
+
+    current_digit_value + remaining_digits_value
+}
+
+fn get_banks(input_type: &InputType) -> Vec<Vec<u8>> {
+    read_input(DAY, input_type)
+        .as_str()
+        .trim()
+        .split("\n")
+        .map(|line| {
+            line.chars()
+                .map(|c| c.to_digit(10).unwrap() as u8)
+                .collect()
+        })
+        .collect()
+}

Day-04/rust/duckulus/day04.rs

@@ -0,0 +1,86 @@
+use crate::common::{InputType, read_input};
+
+const DAY: usize = 4;
+
+pub fn part_one(input_type: &InputType) {
+    let mut grid = get_grid(input_type);
+    let value = remove_unaccessible(&mut grid);
+    println!("{}", value)
+}
+
+pub fn part_two(input_type: &InputType) {
+    let mut grid = get_grid(input_type);
+    let mut sum = 0;
+    let mut value = 0;
+    value = remove_unaccessible(&mut grid);
+    while value > 0 {
+       sum += value;
+        value = remove_unaccessible(&mut grid);
+    }
+    println!("{}", sum)
+}
+
+fn remove_unaccessible(grid: &mut Vec<Vec<Cell>>) -> usize {
+    let mut remove: Vec<(usize, usize)> = Vec::new();
+
+    let rows = grid.len() as i32;
+    for y in 0..rows {
+        let cols = grid[y as usize].len() as i32;
+        for x in 0..cols {
+            if grid[y as usize][x as usize] != Cell::Roll {
+                continue;
+            }
+            let mut neighbors = 0;
+            for dy in -1..=1 {
+                let ny = (y) + dy;
+                if (ny < 0 || ny >= rows) {
+                    continue;
+                }
+                for dx in -1..=1 {
+                    if (dx == 0 && dy == 0) {
+                        continue;
+                    }
+                    let nx = (x) + dx;
+                    if (nx < 0 || nx >= cols) {
+                        continue;
+                    }
+                    if grid[ny as usize][nx as usize] == Cell::Roll {
+                        neighbors += 1;
+                    }
+                }
+            }
+            if neighbors < 4 {
+                remove.push((x as usize, y as usize));
+            }
+        }
+    }
+
+    for (x, y) in remove.iter() {
+        grid[*y][*x] = Cell::Empty;
+    }
+
+    remove.len()
+}
+
+#[derive(PartialEq)]
+enum Cell {
+    Roll,
+    Empty,
+}
+
+fn to_cell(c: char) -> Cell {
+    match c {
+        '.' => Cell::Empty,
+        '@' => Cell::Roll,
+        _ => panic!("Found invalid cell: {}", c),
+    }
+}
+
+fn get_grid(input_type: &InputType) -> Vec<Vec<Cell>> {
+    read_input(DAY, input_type)
+        .as_str()
+        .trim()
+        .lines()
+        .map(|line| line.trim().chars().map(to_cell).collect())
+        .collect()
+}

Day-05/rust/duckulus/day05.rs

@@ -0,0 +1,93 @@
+use crate::common::{InputType, read_input, Range};
+use std::cmp::{max, min};
+use std::collections::HashSet;
+
+const DAY: usize = 5;
+
+fn parse(input_type: &InputType) -> (Vec<Range>, Vec<i64>) {
+    let input = read_input(DAY, input_type);
+    let (ranges, ingredients) = input.split_once("\n\n").unwrap();
+
+    let ranges: Vec<_> = ranges
+        .lines()
+        .map(|line: &str| {
+            let (l, h) = line.split_once("-").unwrap();
+            Range {
+                l: l.parse::<i64>().unwrap(),
+                h: h.parse::<i64>().unwrap(),
+            }
+        })
+        .collect();
+
+    let ingredients: Vec<_> = ingredients
+        .lines()
+        .map(|line: &str| line.parse::<i64>().unwrap())
+        .collect();
+
+    (ranges, ingredients)
+}
+
+pub fn part_one(input_type: &InputType) {
+    let (ranges, ingredients) = parse(input_type);
+
+    let mut sum = 0;
+    for ingredient in ingredients {
+        for range in &ranges {
+            if range.l <= ingredient && range.h >= ingredient {
+                sum += 1;
+                break;
+            }
+        }
+    }
+    println!("{}", sum);
+}
+
+pub fn part_two(input_type: &InputType) {
+    let (ranges, _) = parse(input_type);
+
+    let mut range_list = Vec::new();
+
+    for range in ranges {
+        if range_list.is_empty() {
+            range_list.push(range);
+            continue;
+        }
+
+        let mut intersecting: Vec<Range> = range_list
+            .iter()
+            .filter(|r| r.intersection(&range).is_some())
+            .map(|r| r.clone())
+            .collect();
+        intersecting.push(range.clone());
+
+        let l = intersecting.iter().map(|r| r.l).min().unwrap();
+        let h = intersecting.iter().map(|r| r.h).max().unwrap();
+        let union = Range { l, h };
+
+        range_list.retain(|r| r.intersection(&range).is_none());
+        range_list.push(union);
+    }
+
+    let sum: i64 = range_list.iter().map(|r| r.len()).sum();
+    println!("{}", sum);
+}
+
+#[cfg(test)]
+mod test {
+    use crate::day05::Range;
+
+    #[test]
+    fn test_range_intersect() {
+        let r1 = Range { l: 3, h: 5 };
+        let r2 = Range { l: 6, h: 8 };
+        let r3 = Range { l: 4, h: 9 };
+        let r4 = Range { l: 1, h: 4 };
+        let r5 = Range { l: 5, h: 6 };
+
+        assert_eq!(0, r1.intersect(&r2));
+        assert_eq!(2, r1.intersect(&r3));
+        assert_eq!(2, r1.intersect(&r4));
+        assert_eq!(1, r1.intersect(&r5));
+        assert_eq!(3, r1.intersect(&r1));
+    }
+}