d15

res/15/example

@@ -0,0 +1 @@
+rn=1,cm-,qp=3,cm=2,qp-,pc=4,ot=9,ab=5,pc-,pc=6,ot=7

src/days/d13.rs

@@ -19,7 +19,6 @@ pub fn solve() {
     let result: usize = patterns
         .iter()
         .map(|block| {
-
             // check columns
             let mut ks: Vec<usize> = vec![];
             for k in 1..block[0].len() {

src/days/d14.rs

@@ -1,4 +1,4 @@
-use std::{fs, collections::HashMap};
+use std::{collections::HashMap, fs};
 
 pub fn solve() {
     let path = "res/14/input";
@@ -6,7 +6,8 @@ pub fn solve() {
     let contents = fs::read_to_string(path).expect("I/O error, wrong path?");
     //let contents = BufReader::new(fs::File::open(path).expect("I/O error, wrong path?"));
 
-    let rocks_init: Vec<Vec<char>> = contents.lines()
+    let rocks_init: Vec<Vec<char>> = contents
+        .lines()
         .map(|line| line.chars().collect::<Vec<_>>())
         .collect();
 
@@ -32,7 +33,6 @@ pub fn solve() {
 
     println!("Result 1: {result}");
 
-
     let mut counter = 1;
     let mut cache: HashMap<Vec<Vec<char>>, usize> = HashMap::new();
     let mut cache_used = false;
@@ -42,7 +42,8 @@ pub fn solve() {
                 for y in 0..rocks[0].len() {
                     if rocks[x][y] == 'O' {
                         match counter % 4 {
-                            0 => { // north
+                            0 => {
+                                // north
                                 let mut new_x = x;
                                 while new_x > 0 {
                                     new_x -= 1;
@@ -53,8 +54,9 @@ pub fn solve() {
                                 }
                                 rocks[x][y] = '.';
                                 rocks[new_x][y] = 'O';
-                            },
-                            _ => { // west
+                            }
+                            _ => {
+                                // west
                                 let mut new_y = y;
                                 while new_y > 0 {
                                     new_y -= 1;
@@ -67,7 +69,6 @@ pub fn solve() {
                                 rocks[x][new_y] = 'O';
                             }
                         }
-                        
                     }
                 }
             }
@@ -76,7 +77,8 @@ pub fn solve() {
                 for y in (0..rocks[0].len()).rev() {
                     if rocks[x][y] == 'O' {
                         match counter % 4 {
-                            3 => { // east
+                            3 => {
+                                // east
                                 let mut new_y = y;
                                 while new_y < rocks[0].len() - 1 {
                                     new_y += 1;
@@ -87,8 +89,9 @@ pub fn solve() {
                                 }
                                 rocks[x][y] = '.';
                                 rocks[x][new_y] = 'O';
-                            },
-                            _ => { // south
+                            }
+                            _ => {
+                                // south
                                 let mut new_x = x;
                                 while new_x < rocks.len() - 1 {
                                     new_x += 1;
@@ -101,20 +104,19 @@ pub fn solve() {
                                 rocks[new_x][y] = 'O';
                             }
                         }
-                        
                     }
                 }
             }
         }
 
-        
-
         counter += 1;
 
         if counter % 4 == 0 && !cache_used {
             let cycle_start = cache.get(&rocks);
             match cycle_start {
-                None => { cache.insert(rocks.clone(), counter); },
+                None => {
+                    cache.insert(rocks.clone(), counter);
+                }
                 Some(x) => {
                     let cycle = counter - x;
                     counter += (((4000000000 - counter) / cycle) as usize) * cycle;
@@ -124,10 +126,10 @@ pub fn solve() {
         }
     }
 
-    result = rocks.iter().enumerate()
-        .map(|(i_row, row)| {
-            row.iter().filter(|c| **c == 'O').count() * (rocks.len() - i_row)
-        })
+    result = rocks
+        .iter()
+        .enumerate()
+        .map(|(i_row, row)| row.iter().filter(|c| **c == 'O').count() * (rocks.len() - i_row))
         .sum();
 
     println!("Result 2: {result}");

src/days/d15.rs

@@ -0,0 +1,59 @@
+use std::{collections::HashMap, fs};
+
+pub fn solve() {
+    let path = "res/15/input";
+
+    let mut contents = fs::read_to_string(path).expect("I/O error, wrong path?");
+    //let contents = BufReader::new(fs::File::open(path).expect("I/O error, wrong path?"));
+
+    contents.retain(|c| !c.is_whitespace());
+    let result: usize = contents
+        .split(',')
+        .map(|p| p.chars().fold(0, |x, y| ((x + y as usize) * 17) % 256))
+        .sum();
+
+    println!("Result 1: {result}");
+
+    let mut boxes: HashMap<usize, Vec<(&str, usize)>> = HashMap::new();
+    for p in contents.split(',') {
+        let (t, n) = match p.contains('=') {
+            true => {
+                let (t, n) = p.split_once('=').unwrap();
+                (t, n.parse::<usize>().unwrap())
+            }
+            false => {
+                let (t, _) = p.split_once('-').unwrap();
+                (t, 0usize)
+            }
+        };
+        let i = t.chars().fold(0, |x, y| ((x + y as usize) * 17) % 256);
+
+        let v = boxes.entry(i).or_insert(vec![]);
+        if n == 0 {
+            if v.iter().any(|(p, _)| *p == t) {
+                v.remove(v.iter().position(|(p, _)| *p == t).unwrap());
+            }
+        } else {
+            if v.iter().any(|(p, _)| *p == t) {
+                let pos = v.iter().position(|(p, _)| *p == t).unwrap();
+                v[pos] = (t, n);
+            } else {
+                v.push((t, n))
+            }
+        }
+    }
+
+    dbg!(&boxes);
+
+    let result: usize = boxes
+        .iter()
+        .map(|(k, v)| {
+            v.iter()
+                .enumerate()
+                .map(|(i, (_, n))| (k + 1) * (i + 1) * n)
+                .sum::<usize>()
+        })
+        .sum();
+
+    println!("Result 2: {result}");
+}

src/main.rs

@@ -1,12 +1,81 @@
 pub mod days;
-#[macro_use] extern crate scan_fmt;
+#[macro_use]
+extern crate scan_fmt;
+
+use std::time::Instant;
 
 fn main() {
-    days::d14::solve()
+    days::d15::solve()
     //_all_days()
 }
 
 fn _all_days() {
-    println!("Day 1");
+    let start = Instant::now();
+    println!("\nDay 1");
     days::d01::solve();
+    print_elapsed(&start);
+
+    println!("\nDay 2");
+    days::d02::solve();
+    print_elapsed(&start);
+
+    println!("\nDay 3");
+    days::d03::solve();
+    print_elapsed(&start);
+
+    println!("\nDay 4");
+    days::d04::solve();
+    print_elapsed(&start);
+
+    println!("\nDay 5");
+    days::d05::solve();
+    print_elapsed(&start);
+
+    println!("\nDay 6");
+    days::d06::solve();
+    print_elapsed(&start);
+
+    println!("\nDay 7");
+    days::d07::solve();
+    print_elapsed(&start);
+
+    println!("\nDay 8");
+    days::d08::solve();
+    print_elapsed(&start);
+
+    println!("\nDay 9");
+    days::d09::solve();
+    print_elapsed(&start);
+
+    println!("\nDay 10");
+    days::d10::solve();
+    print_elapsed(&start);
+
+    println!("\nDay 11");
+    days::d11::solve();
+    print_elapsed(&start);
+
+    println!("\nDay 12");
+    days::d12::solve();
+    print_elapsed(&start);
+
+    println!("\nDay 13");
+    days::d13::solve();
+    print_elapsed(&start);
+
+    println!("\nDay 14");
+    days::d14::solve();
+    print_elapsed(&start);
+
+    println!("\nDay 15");
+    days::d15::solve();
+    print_elapsed(&start);
+}
+
+fn print_elapsed(start: &Instant) {
+    println!(
+        " Elapsed: {}.{}ms",
+        start.elapsed().as_millis(),
+        start.elapsed().as_micros() % 1000
+    )
 }