From 80be8199de58dd1c84ad1399dada312daf36cf39 Mon Sep 17 00:00:00 2001
From: MelKam <melkam464@gmail.com>
Date: Sun, 4 Dec 2022 18:34:48 +0000
Subject: [PATCH] day_4: rust solution

---
 Cargo.lock             |    4 +
 Cargo.toml             |    3 +-
 day_4/input.txt        | 1000 ++++++++++++++++++++++++++++++++++++++++
 day_4/rust/Cargo.toml  |    8 +
 day_4/rust/src/main.rs |   79 ++++
 5 files changed, 1093 insertions(+), 1 deletion(-)
 create mode 100644 day_4/input.txt
 create mode 100644 day_4/rust/Cargo.toml
 create mode 100644 day_4/rust/src/main.rs

diff --git a/Cargo.lock b/Cargo.lock
index 8cef076..8448329 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -13,3 +13,7 @@ version = "0.1.0"
 [[package]]
 name = "day_3_rust"
 version = "0.1.0"
+
+[[package]]
+name = "day_4_rust"
+version = "0.1.0"
diff --git a/Cargo.toml b/Cargo.toml
index 559a5f8..bc34f13 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,5 +3,6 @@ resolver = "2"
 members = [
     "day_1/rust",
 		"day_2/rust",
-		"day_3/rust"
+		"day_3/rust",
+		"day_4/rust"
 ]
\ No newline at end of file
diff --git a/day_4/input.txt b/day_4/input.txt
new file mode 100644
index 0000000..34f523f
--- /dev/null
+++ b/day_4/input.txt
@@ -0,0 +1,1000 @@
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\ No newline at end of file
diff --git a/day_4/rust/Cargo.toml b/day_4/rust/Cargo.toml
new file mode 100644
index 0000000..ddbce28
--- /dev/null
+++ b/day_4/rust/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day_4_rust"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/day_4/rust/src/main.rs b/day_4/rust/src/main.rs
new file mode 100644
index 0000000..0c8cada
--- /dev/null
+++ b/day_4/rust/src/main.rs
@@ -0,0 +1,79 @@
+#[derive(Debug)]
+struct Range {
+	start: i32,
+	end: i32,
+}
+
+impl From<&str> for Range {
+	fn from(string: &str) -> Self {
+		let (start, end) = match string.split_once("-") {
+			Some((s, e)) => (s.parse::<i32>().unwrap(), e.parse::<i32>().unwrap()),
+			_ => panic!(),
+		};
+
+		return Self { start, end };
+	}
+}
+
+fn ranges_fully_contain(range1: &Range, range2: &Range) -> bool {
+	if range1.start == range2.start || range1.end == range2.end {
+		return true;
+	}
+	if range1.start < range2.start && range1.end > range2.end {
+		return true;
+	}
+	if range2.end > range1.end {
+		return true;
+	}
+
+	return false;
+}
+
+fn ranges_overlap(range1: &Range, range2: &Range) -> bool {
+	if range1.start == range2.start
+		|| range1.end == range2.end
+		|| range1.start == range2.end
+		|| range2.start == range1.end
+	{
+		return true;
+	}
+	if range1.start > range2.start && range2.end > range1.start {
+		return true;
+	}
+	if range1.start < range2.start && range1.end > range2.start {
+		return true;
+	}
+
+	return false;
+}
+
+fn main() {
+	let data = include_str!("../../input.txt");
+
+	let result: i32 = data
+		.lines()
+		.map(|line| {
+			let (range1, range2) = match line.split_once(",") {
+				Some((a, b)) => (Range::from(a), Range::from(b)),
+				_ => panic!(),
+			};
+
+			return ranges_fully_contain(&range1, &range2) as i32;
+		})
+		.sum();
+
+	let result2: i32 = data
+		.lines()
+		.map(|line| {
+			let (range1, range2) = match line.split_once(",") {
+				Some((a, b)) => (Range::from(a), Range::from(b)),
+				_ => panic!(),
+			};
+
+			return ranges_overlap(&range1, &range2) as i32;
+		})
+		.sum();
+
+	println!("{result}");
+	println!("{result2}");
+}