level 3 finished

src/day2.rs

@@ -66,14 +66,4 @@ struct Box {
     l: i32,
     w: i32,
     h: i32,
-}
-
-impl Box {
-    pub fn new() -> Box {
-        Box {
-            l: 0,
-            w: 0,
-            h: 0,
-        }
-    }
 }

src/day3.rs

@@ -0,0 +1,106 @@
+pub struct Data {
+    inst: Vec<Dir>,
+}
+
+impl Data {
+    pub fn new() -> Data {
+        Data {
+            inst: Vec::new(),
+        }
+    }
+
+    pub fn parse(&mut self, input: String) {
+        for c in input.chars() {
+            match c {
+                '^' => {
+                    self.inst.push(Dir::North);
+                },
+                '>' => {
+                    self.inst.push(Dir::East);
+                },
+                'v' => {
+                    self.inst.push(Dir::South);
+                },
+                '<' => {
+                    self.inst.push(Dir::West);
+                },
+                _ => (),
+            }
+        }
+    }
+
+
+    pub fn visit(&mut self) -> i32 {
+        let mut pos = Point{x: 0, y: 0};
+        let mut way = Vec::new();
+        way.push(pos);
+        for d in self.inst.clone() {
+            pos.walk(d, 1);
+            way.push(pos);
+        }
+        way.sort_by(|a, b| a.abs().cmp(&b.abs()));
+        way.dedup_by(|a, b| a.x == b.x && a.y == b.y);
+        way.len() as i32
+    }
+
+    pub fn robot(&mut self) -> i32 {
+        let mut pos = Point{x: 0, y: 0};
+        let mut way = Vec::new();
+        let mut pos_robot = Point{x: 0, y: 0};
+        way.push(pos);
+        way.push(pos_robot);
+        for (i, d) in self.inst.clone().into_iter().enumerate() {
+            match i % 2 {
+                0 => {
+                    pos.walk(d, 1);
+                    way.push(pos);
+                },
+                _ => {
+                    pos_robot.walk(d, 1);
+                    way.push(pos_robot);
+                },
+            }
+        }
+        way.sort_by(|a, b| a.abs().cmp(&b.abs()));
+        way.dedup_by(|a, b| a.x == b.x && a.y == b.y);
+        way.len() as i32
+    }
+}
+
+#[derive(Copy, Clone)]
+struct Point {
+    x: i32,
+    y: i32,
+}
+
+impl Point {
+    pub fn walk(&mut self, dir: Dir, dist: i32) {
+        match dir {
+            Dir::North => self.y += dist,
+            Dir::East => self.x += dist,
+            Dir::South => self.y -= dist,
+            Dir::West => self.x -= dist,
+        }
+    }
+    pub fn abs(&self) -> i64 {
+        ((self.x as i64) << 32) + self.y as i64
+    }
+}
+
+impl PartialEq for Point {
+    fn eq(&self, other: &Point) -> bool {
+        let mut res = self.x == other.x;
+        res &= self.y == other.y;
+        res
+    }
+}
+
+impl Eq for Point {}
+
+#[derive(Copy, Clone)]
+enum Dir {
+    North,
+    East,
+    South,
+    West,
+}

src/main.rs

@@ -1,5 +1,6 @@
 mod day1;
 mod day2;
+mod day3;
 mod tests;
 
 
@@ -36,4 +37,19 @@ fn main() {
         }
         Err(msg) => println!("{}",msg),
     };
+
+    match File::open("day3.txt") {
+        Ok(mut f) => {
+            let mut input = String::new();
+            match f.read_to_string(&mut input) {
+                Ok(_) => (),
+                Err(msg) => println!("{}",msg),
+            }
+            let mut d3 = day3::Data::new();
+            d3.parse(input);
+            println!("day3 visit: {}", d3.visit());
+            println!("day3 robot: {}", d3.robot());
+        }
+        Err(msg) => println!("{}",msg),
+    };
 }

src/tests.rs

@@ -2,37 +2,43 @@ use super::*;
 
 #[test]
 fn day1_1() {
-    let mut input = String::from("(())");
+    let input = String::from("(())");
     let mut day1 = day1::Data::new();
     day1.parse(input);
-    let mut res = day1.floor();
+    let res = day1.floor();
     assert_eq!(res, 0);
+}
 
-    input = String::from("()()");
+#[test]
-    day1 = day1::Data::new();
+fn day1_2() {
+    let input = String::from("()()");
+    let mut day1 = day1::Data::new();
     day1.parse(input);
-    res = day1.floor();
+    let res = day1.floor();
     assert_eq!(res, 0);
 }
 
 #[test]
-fn day1_2() {
+fn day1_3() {
-    let mut input = String::from("(((");
+    let input = String::from("(((");
     let mut day1 = day1::Data::new();
     day1.parse(input);
-    let mut res = day1.floor();
+    let res = day1.floor();
     assert_eq!(res, 3);
+}
 
-    input = String::from("(()(()(");
+#[test]
-    day1 = day1::Data::new();
+fn day1_4() {
+    let input = String::from("(()(()(");
+    let mut day1 = day1::Data::new();
     day1.parse(input);
-    res = day1.floor();
+    let res = day1.floor();
     assert_eq!(res, 3);
 }
 
 #[test]
-fn day1_3() {
+fn day1_5() {
-    let mut input = String::from("))(((((");
+    let input = String::from("))(((((");
     let mut day1 = day1::Data::new();
     day1.parse(input);
     let res = day1.floor();
@@ -40,38 +46,44 @@ fn day1_3() {
 }
 
 #[test]
-fn day1_4() {
+fn day1_6() {
-    let mut input = String::from("())");
+    let input = String::from("())");
     let mut day1 = day1::Data::new();
     day1.parse(input);
-    let mut res = day1.floor();
+    let res = day1.floor();
     assert_eq!(res, -1);
+}
 
-    input = String::from("))(");
+#[test]
-    day1 = day1::Data::new();
+fn day1_7() {
+    let input = String::from("))(");
+    let mut day1 = day1::Data::new();
     day1.parse(input);
-    res = day1.floor();
+    let res = day1.floor();
     assert_eq!(res, -1);
 }
 
 #[test]
-fn day1_5() {
+fn day1_8() {
-    let mut input = String::from(")))");
+    let input = String::from(")))");
     let mut day1 = day1::Data::new();
     day1.parse(input);
-    let mut res = day1.floor();
+    let res = day1.floor();
     assert_eq!(res, -3);
+}
 
-    input = String::from(")())())");
+#[test]
-    day1 = day1::Data::new();
+fn day1_9() {
+    let input = String::from(")())())");
+    let mut day1 = day1::Data::new();
     day1.parse(input);
-    res = day1.floor();
+    let res = day1.floor();
     assert_eq!(res, -3);
 }
 
 #[test]
-fn day1_6() {
+fn day1_10() {
-    let mut input = String::from(")");
+    let input = String::from(")");
     let mut day1 = day1::Data::new();
     day1.parse(input);
     let res = day1.basement();
@@ -79,8 +91,8 @@ fn day1_6() {
 }
 
 #[test]
-fn day1_7() {
+fn day1_11() {
-    let mut input = String::from("()())");
+    let input = String::from("()())");
     let mut day1 = day1::Data::new();
     day1.parse(input);
     let res = day1.basement();
@@ -89,7 +101,7 @@ fn day1_7() {
 
 #[test]
 fn day2_1() {
-    let mut input = String::from("2x3x4");
+    let input = String::from("2x3x4");
     let mut day2 = day2::Data::new();
     day2.parse(input);
     let mut res = day2.paper();
@@ -101,12 +113,54 @@ fn day2_1() {
 
 #[test]
 fn day2_2() {
-    let mut input = String::from("1x1x10");
+    let input = String::from("1x1x10");
     let mut day2 = day2::Data::new();
     day2.parse(input);
     let mut res = day2.paper();
     assert_eq!(res, 43);
 
-     res = day2.ribbon();
+    res = day2.ribbon();
     assert_eq!(res, 14);
 }
+
+#[test]
+fn day3_1() {
+    let input = String::from(">");
+    let mut day3 = day3::Data::new();
+    day3.parse(input);
+    let res = day3.visit();
+    assert_eq!(res, 2);
+}
+
+#[test]
+fn day3_2() {
+    let input = String::from("^v");
+    let mut day3 = day3::Data::new();
+    day3.parse(input);
+    let res = day3.robot();
+    assert_eq!(res, 3);
+}
+
+#[test]
+fn day3_3() {
+    let input = String::from("^>v<");
+    let mut day3 = day3::Data::new();
+    day3.parse(input);
+    let mut res = day3.visit();
+    assert_eq!(res, 4);
+
+    res = day3.robot();
+    assert_eq!(res, 3);
+}
+
+#[test]
+fn day3_4() {
+    let input = String::from("^v^v^v^v^v");
+    let mut day3 = day3::Data::new();
+    day3.parse(input);
+    let mut res = day3.visit();
+    assert_eq!(res, 2);
+
+    res = day3.robot();
+    assert_eq!(res, 11);
+}