From cad8a7d48d9eb03d5fd7f5908893a98e5a56f297 Mon Sep 17 00:00:00 2001
From: kleph <kleph@kleph.eu>
Date: Mon, 2 Dec 2024 22:56:43 +0100
Subject: [PATCH] 2024 - Day 2 part 1 - rust

---
 2024/rust2/.gitignore  |  2 ++
 2024/rust2/Cargo.toml  |  6 ++++++
 2024/rust2/src/main.rs | 43 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 51 insertions(+)
 create mode 100644 2024/rust2/.gitignore
 create mode 100644 2024/rust2/Cargo.toml
 create mode 100644 2024/rust2/src/main.rs

diff --git a/2024/rust2/.gitignore b/2024/rust2/.gitignore
new file mode 100644
index 0000000..a9d37c5
--- /dev/null
+++ b/2024/rust2/.gitignore
@@ -0,0 +1,2 @@
+target
+Cargo.lock
diff --git a/2024/rust2/Cargo.toml b/2024/rust2/Cargo.toml
new file mode 100644
index 0000000..c316124
--- /dev/null
+++ b/2024/rust2/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rust2"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/2024/rust2/src/main.rs b/2024/rust2/src/main.rs
new file mode 100644
index 0000000..fe3ddbc
--- /dev/null
+++ b/2024/rust2/src/main.rs
@@ -0,0 +1,43 @@
+use std::io::{BufRead, BufReader};
+use std::fs::File;
+
+fn is_safe(v:Vec<u32>) -> bool
+{
+    let s_diff = if v[0] > v[1] {false} else {true};    
+
+    for n in 1..v.len() {        
+        let diff = v[n].abs_diff(v[n - 1]);
+
+        if diff > 3 || diff == 0{
+            return false;
+        }
+
+        let s_diff2 = if v[n] < v[n-1] {false} else {true};
+        if s_diff2 ^ s_diff {
+            return false;
+        }
+        
+    }
+    return true;
+}
+
+fn main (){
+    // let filename = "../2/input_example.txt";
+    let filename = "../2/input.txt";
+    let file = BufReader::new(File::open(filename).expect("Unable to open file"));
+    let mut safe: u32 = 0;
+
+    for line in file.lines() { 
+        let wline = line.unwrap();
+        let nums: Vec<u32> = wline.split(' ')
+            .filter(|&x| !x.is_empty())
+            .map(|x| x.parse().unwrap())
+            .collect();
+        
+        if is_safe(nums){
+            safe += 1;
+        }       
+    }    
+
+    println!("{}", safe);
+}