first day

Author: misnard

data/examples/01.txt

@@ -0,0 +1,10 @@
+L68
+L30
+R48
+L5
+R60
+L55
+L1
+L99
+R14
+L82

data/examples/02.txt

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+advent_of_code::solution!(1);
+
+pub fn part_one(input: &str) -> Option<u64> {
+    let lines = input.lines();
+
+    let mut hitted_zero_times = 0;
+    let mut current_state: i32 = 50;
+
+    for line in lines {
+        let movement_direction = &line[0..1];
+        let movement_count: i32 = line[1..].parse().unwrap();
+
+        match movement_direction {
+            "L" => {
+                current_state = (current_state - movement_count) % 100;
+            }
+            "R" => {
+                current_state = (movement_count + current_state) % 100;
+            }
+            _ => {
+                panic!("Nein")
+            }
+        }
+
+        if current_state == 0 {
+            hitted_zero_times += 1
+        }
+    }
+
+    Some(hitted_zero_times)
+}
+
+pub fn part_two(input: &str) -> Option<u64> {
+    let lines = input.lines();
+
+    let mut hitted_zero_times: u64 = 0;
+    let mut current_state: i64 = 50;
+
+    for line in lines {
+        let movement_direction = &line[0..1];
+        let movement_count: i64 = line[1..].parse().unwrap();
+
+        match movement_direction {
+            "L" => {
+                let first_hit = if current_state == 0 {
+                    100
+                } else {
+                    current_state
+                };
+                let zeros = if movement_count >= first_hit {
+                    1 + (movement_count - first_hit) / 100
+                } else {
+                    0
+                };
+                hitted_zero_times += zeros as u64;
+
+                current_state = ((current_state - movement_count) % 100 + 100) % 100;
+            }
+            "R" => {
+                let first_hit = if current_state == 0 {
+                    100
+                } else {
+                    100 - current_state
+                };
+                let zeros = if movement_count >= first_hit {
+                    1 + (movement_count - first_hit) / 100
+                } else {
+                    0
+                };
+                hitted_zero_times += zeros as u64;
+
+                current_state = (current_state + movement_count) % 100;
+            }
+            _ => {
+                panic!("Nein")
+            }
+        }
+    }
+
+    Some(hitted_zero_times)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_part_one() {
+        let result = part_one(&advent_of_code::template::read_file("examples", DAY));
+        assert_eq!(result, None);
+    }
+
+    #[test]
+    fn test_part_two() {
+        let result = part_two(&advent_of_code::template::read_file("examples", DAY));
+        assert_eq!(result, None);
+    }
+}

src/bin/01.rs

@@ -0,0 +1,26 @@
+advent_of_code::solution!(2);
+
+pub fn part_one(input: &str) -> Option<u64> {
+    None
+}
+
+pub fn part_two(input: &str) -> Option<u64> {
+    None
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_part_one() {
+        let result = part_one(&advent_of_code::template::read_file("examples", DAY));
+        assert_eq!(result, None);
+    }
+
+    #[test]
+    fn test_part_two() {
+        let result = part_two(&advent_of_code::template::read_file("examples", DAY));
+        assert_eq!(result, None);
+    }
+}