From 244d3dfa233371db0adcff329283bb1ce9bba9f5 Mon Sep 17 00:00:00 2001
From: Yigit Sever
Date: Tue, 6 Dec 2022 14:47:43 +0300
Subject: 2022, day4: done

---
 2022/day4/part1/Cargo.toml  |  9 ++++++++
 2022/day4/part1/src/main.rs | 50 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 59 insertions(+)
 create mode 100644 2022/day4/part1/Cargo.toml
 create mode 100644 2022/day4/part1/src/main.rs

(limited to '2022/day4/part1')

diff --git a/2022/day4/part1/Cargo.toml b/2022/day4/part1/Cargo.toml
new file mode 100644
index 0000000..f14fe90
--- /dev/null
+++ b/2022/day4/part1/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "part1"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+itertools = "0.10.5"
diff --git a/2022/day4/part1/src/main.rs b/2022/day4/part1/src/main.rs
new file mode 100644
index 0000000..a4b7e38
--- /dev/null
+++ b/2022/day4/part1/src/main.rs
@@ -0,0 +1,50 @@
+use itertools::Itertools;
+
+#[derive(Debug)]
+struct Elf {
+    start: usize,
+    end: usize,
+}
+
+#[derive(Debug)]
+struct Pair(Elf, Elf);
+
+impl Elf {
+    pub fn new(range: &str) -> Self {
+        if let Some((start, end)) = range.to_string().split("-").collect_tuple() {
+            let start: usize = start.parse().unwrap();
+            let end: usize = end.parse().unwrap();
+            Self { start, end }
+        } else {
+            panic!("Expected two elements");
+        }
+    }
+}
+
+impl Pair {
+    pub fn new(line: &str) -> Self {
+        if let Some((first, second)) = line.to_string().split(",").collect_tuple() {
+            Pair(Elf::new(first), Elf::new(second))
+        } else {
+            panic!("Expected two elements");
+        }
+    }
+}
+
+impl Pair {
+    fn contains(&self) -> bool {
+        return (self.0.start <= self.1.start && self.0.end >= self.1.end)
+            || (self.0.start >= self.1.start && self.0.end <= self.1.end);
+    }
+}
+
+fn main() {
+    let sum: usize = include_str!("../../example")
+        .lines()
+        .map(|l| Pair::new(l))
+        .map(|p| p.contains())
+        .filter(|r| *r)
+        .count();
+
+    println!("{}", sum);
+}
-- 
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