Day 4

src/bin/04_1.rs

@@ -0,0 +1,41 @@
+use std::fs;
+
+use anyhow::Result;
+use itertools::Itertools;
+
+
+fn main() -> Result<()> {
+    let input = fs::read_to_string("input/04.txt")?;
+
+    let lines: Vec<&str> = input
+        .split("\n")
+        .filter(|s| *s != "")
+        .collect_vec();
+
+
+    // ........fl........fu......
+    // ......sl............su....
+    //
+    // ..fl.....fu...............
+    // ...........sl....su.......
+    //
+    // ........fl........fu......
+    // ..........sl....su........
+    //
+    // ................fl....fu..
+    // ..sl......su..............
+
+
+    let result = lines
+        .into_iter()
+        .map(|s| s.split(","))
+        .map(|mut i| (i.next().unwrap(), i.next().unwrap()))
+        .map(|(f, s)| (f.split("-"), s.split("-")))
+        .map(|(mut f, mut s)| (f.next().unwrap().parse::<i32>().ok(), f.next().unwrap().parse::<i32>().ok(), s.next().unwrap().parse::<i32>().ok(), s.next().unwrap().parse::<i32>().ok()))
+        .filter(|(fl, fu, sl, su)| (fl >= sl && fu <= su && fu >= sl) || (fl <= sl && fu >= su && fl <= su))
+        .count();
+
+    println!("{result}");
+
+    return Ok(());
+}

src/bin/04_2.rs

@@ -0,0 +1,41 @@
+use std::fs;
+
+use anyhow::Result;
+use itertools::Itertools;
+
+
+fn main() -> Result<()> {
+    let input = fs::read_to_string("input/04.txt")?;
+
+    let lines: Vec<&str> = input
+        .split("\n")
+        .filter(|s| *s != "")
+        .collect_vec();
+
+
+    // ........fl........fu......
+    // ......sl............su....
+    //
+    // ..fl.....fu...............
+    // .......sl....su.........
+    //
+    // ........fl........fu......
+    // ..........sl....su........
+    //
+    // ........fl....fu..........
+    // ..sl......su..............
+
+
+    let result = lines
+        .into_iter()
+        .map(|s| s.split(","))
+        .map(|mut i| (i.next().unwrap(), i.next().unwrap()))
+        .map(|(f, s)| (f.split("-"), s.split("-")))
+        .map(|(mut f, mut s)| (f.next().unwrap().parse::<i32>().ok(), f.next().unwrap().parse::<i32>().ok(), s.next().unwrap().parse::<i32>().ok(), s.next().unwrap().parse::<i32>().ok()))
+        .filter(|(fl, fu, sl, su)| (fl >= sl && fl <= su) || (fu >= sl && fu <= su ) || (sl >= fl && sl <= fu) || (su >= fl && su <= fu))
+        .count();
+
+    println!("{result}");
+
+    return Ok(());
+}