day 2 :DDD

Cargo.lock

@@ -6,6 +6,10 @@ version = 3
 name = "day01"
 version = "0.1.0"
 
+[[package]]
+name = "day02"
+version = "0.1.0"
+
 [[package]]
 name = "tiesto"
 version = "0.1.0"

Cargo.toml

@@ -4,27 +4,27 @@ members = [
 	"tiesto",
 	"day01",
 	"day02",
-	"day03",
-	"day04",
-	"day05",
-	"day06",
-	"day07",
-	"day08",
-	"day09",
-	"day10",
-	"day11",
-	"day12",
-	"day13",
-	"day14",
-	"day15",
-	"day16",
-	"day17",
-	"day18",
-	"day19",
-	"day20",
-	"day21",
-	"day22",
-	"day23",
-	"day24",
-	"day25",
+#	"day03",
+#	"day04",
+#	"day05",
+#	"day06",
+#	"day07",
+#	"day08",
+#	"day09",
+#	"day10",
+#	"day11",
+#	"day12",
+#	"day13",
+#	"day14",
+#	"day15",
+#	"day16",
+#	"day17",
+#	"day18",
+#	"day19",
+#	"day20",
+#	"day21",
+#	"day22",
+#	"day23",
+#	"day24",
+#	"day25",
 ]

day02/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "day02"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

day02/src/main.rs

@@ -0,0 +1,79 @@
+use std::fs;
+
+fn main() {
+    const FILE_PATH: &str = "input.txt";
+    println!("Hi this is the second day of AOC2022, first we will read the file {}", FILE_PATH);
+    let contents = fs::read_to_string(FILE_PATH)
+        .expect("Should have been able to read the file");
+
+    println!("The amount of points you whould get is: {}", get_points(&contents, &get_round));
+    println!("The ammount of point you whould get using the real strategy are: {}", get_points(&contents, &get_true_round));
+
+}
+
+fn get_true_round(a: &str, b: &str) -> i32 {
+    let b = match b {
+        "X" => 0,
+        "Y" => 3,
+        "Z" => 6,
+        _ => panic!("WTF")
+    };
+    let a = match a {
+        "A" => 1,
+        "B" => 2,
+        "C" => 3,
+        _ => panic!("WTF")
+    };
+    ((b/3+2)+a)%3+b
+}
+
+fn get_round(a: &str, b: &str) -> i32 {
+    let tot = match b {
+        "X" => 1,
+        "Y" => 2,
+        "Z" => 3,
+        _ => panic!("WTF")
+    };
+    let a = match a {
+        "A" => 1,
+        "B" => 2,
+        "C" => 3,
+        _ => panic!("WTF")
+    };
+    return match a - tot{
+        1 => 0,
+        0 => 3,
+        2 => 6,
+        -1 => 6,
+        -2 => 0,
+        _ => panic!("Numers")
+    } + tot
+}
+
+fn get_points(input: &str, f: &dyn Fn(&str,&str) -> i32) -> i32 {
+    input.lines().map(|l| {
+        let mut n = l.split_whitespace();
+        let a = n.next().expect("input must be correct");
+        f(a, n.next().expect("input must be correct"))
+    }
+    ).sum()
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    #[test]
+    fn it_works() {
+        let input = r#"A Y
+B X
+C Z"#;
+        assert_eq!(get_points(input, &get_round), 15);
+    }
+    #[test]
+    fn it_works2() {
+        let input = r#"A Y
+B X
+C Z"#;
+        assert_eq!(get_points(input, &get_true_round), 12);
+    }
+}