day_2_2

functionnal thingy thingy

src/day_2_1.rs

@@ -3,7 +3,6 @@ use std::fs;
 pub fn solve_day_2_1() {
     let file_path = "/home/clement/RustroverProjects/advent_of_code/src/inputs/input_2.txt";
     println!("In file {file_path}");
-
     let contents = fs::read_to_string(file_path)
         .expect("Something went wrong reading the file")
         .split("\n")

src/day_2_2.rs

@@ -0,0 +1,42 @@
+use std::collections::HashMap;
+use std::fs;
+
+pub fn is_safe(level : &Vec<i32>, skip_i : usize) -> bool
+{
+    let level_without_skip_i = level
+        .iter()
+        .enumerate()
+        .filter(|(i, _)| *i != skip_i)
+        .map(|(_, x)| *x)
+        .collect::<Vec<i32>>();
+
+
+    let should_increase = level_without_skip_i[1] > level_without_skip_i[0];
+
+    level_without_skip_i.windows(2).all(|win| (
+        win[1] - win[0]).abs() <= 3 &&
+        (win[1] > win[0]) == should_increase &&
+        win[1] != win[0])
+}
+pub fn solve_day_2_2() {
+    let file_path = "/home/clement/RustroverProjects/advent_of_code/src/inputs/input_2.txt";
+    println!("In file {file_path}");
+
+    let binding = fs::read_to_string(file_path)
+        .expect("Something went wrong reading the file");
+
+    let contents = binding
+        .split("\n")
+        .map(|x|x.split(" ").map(|y| y.parse::<i32>().unwrap()).collect::<Vec<i32>>());
+
+    let good_levels = contents.map(
+        |level| {
+            (0..(level.len()+1)).rev().any(|i| is_safe(&level, i))
+        }
+    );
+
+    let ans = good_levels.filter(|x| *x).count();
+
+    println!("{:?}", ans);
+
+}

src/main.rs

@@ -1,14 +1,17 @@
 // mod day_1_1;
 // mod day_1_2;
 mod day_2_1;
+mod day_2_2;
 
 // use crate::day_1_1::solve_day_1_1;
 // use crate::day_1_2::solve_day_1_2;
-use crate::day_2_1::solve_day_2_1;
+//use crate::day_2_1::solve_day_2_1;
+use crate::day_2_2::solve_day_2_2;
 
 fn main() {
     println!("Hello, world!");
-    // solve_day_1_1();
+    //solve_day_1_1();
     //solve_day_1_2();
-    solve_day_2_1();
+    //solve_day_2_1();
+    solve_day_2_2();
 }