2024/10-11

tbali0524 · tbali0524 · commit 854e5f3b7ac7 · 2024-12-11T17:37:36.000+01:00
diff --git a/README.md b/README.md
@@ -2,7 +2,7 @@
 
 ![php v8.4](https://shields.io/badge/php-8.4-blue?logo=php)
 ![build](https://img.shields.io/github/actions/workflow/status/tbali0524/advent-of-code-solutions/qa.yml)
-![AoC stars](https://img.shields.io/badge/total%20AoC%20⭐-468-green)
+![AoC stars](https://img.shields.io/badge/total%20AoC%20⭐-472-green)
 ![license](https://img.shields.io/github/license/tbali0524/advent-of-code-solutions)
 
 * [AoC website](https://adventofcode.com/)
diff --git a/input/2024/Aoc2024Day10.txt b/input/2024/Aoc2024Day10.txt
@@ -0,0 +1,49 @@
+3456782987078721223458762106567889430671098769654
+4349891276129850312369643487656976521589123658723
+3232010125034765409874554998540125102479034567014
+2101326734535676332123667887030434234328798598323
+3210417898743980123011256770121898985215657685412
+4398506987652098834500349843210763876004034556702
+0347615456901127985678932352107652187123126549811
+1256789347810036376547101461458943098014987430910
+2187693210211245217832106570367892367123470121321
+0096540124300354308943067689256701451234565123438
+1454431035445475217652108212101610450965434034589
+2563224546766986700543299103454321345876123127676
+3470110450897867891056782456969010216789007098787
+2989323761210568782344321327878543100218218989896
+1056109894323479653451450018967632321307127676125
+0347234765012988598560561009878901430456034565034
+1218945678967893467621872323451010569210183034789
+2301856521050012332132965410067129878345892123654
+2545665430541003343045894890128934565456734301203
+1238756767632174956556787761238981250349845210312
+0019567898948985867843295454345670361238896901498
+1123498787656876768930176321054865476766767810567
+2345019698343403452343289830238956789857654329801
+1276520501232312301450109321107678900348943210762
+0989431452301659412567018450234543211234510345643
+7871012369498748703698107567892454322365431239652
+6982321078543237654899216012301898723670121238701
+5983430347670100102765345985432385610184210321981
+4676521257881243211255435876987894321095103430870
+3676598766999356980346126785456765467656712561561
+2189432105438767898987065490308701378345899874432
+3008710219127346710897654301219652109234710923653
+3219623478033235021588923218789543212121023014567
+4988510565454104134676517809654194501033454321098
+5675432109567893245785406945403087672122569498545
+4789323678652107896690345236712121088011078567632
+3291014569743456987501210189874534599187563458901
+2104349878898543210012981065963678678296782768940
+1001256763278787620125878874052169501345891857434
+3210389854109696787434569943141054322321710996523
+4389876703010545896563430812232189810430601087012
+0478945012321032398654321001145670798510512989802
+1567032129834121067743433234030321667623403676501
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+4567889487637650932342127689234256734676512387212
+9654112390128941013234534548940189836785003456101
+8741001498037432100105677637654302345494176543212
+7632110567126501211012988921013211012343289810101
diff --git a/input/2024/Aoc2024Day10ex1.txt b/input/2024/Aoc2024Day10ex1.txt
@@ -0,0 +1,8 @@
+89010123
+78121874
+87430965
+96549874
+45678903
+32019012
+01329801
+10456732
diff --git a/input/2024/Aoc2024Day10ex2.txt b/input/2024/Aoc2024Day10ex2.txt
@@ -0,0 +1,4 @@
+0123
+1234
+8765
+9876
diff --git a/input/2024/Aoc2024Day10ex3.txt b/input/2024/Aoc2024Day10ex3.txt
@@ -0,0 +1,7 @@
+...0...
+...1...
+...2...
+6543456
+7.....7
+8.....8
+9.....9
diff --git a/input/2024/Aoc2024Day10ex4.txt b/input/2024/Aoc2024Day10ex4.txt
@@ -0,0 +1,7 @@
+..90..9
+...1.98
+...2..7
+6543456
+765.987
+876....
+987....
diff --git a/input/2024/Aoc2024Day10ex5.txt b/input/2024/Aoc2024Day10ex5.txt
@@ -0,0 +1,7 @@
+10..9..
+2...8..
+3...7..
+4567654
+...8..3
+...9..2
+.....01
diff --git a/input/2024/Aoc2024Day10ex6.txt b/input/2024/Aoc2024Day10ex6.txt
@@ -0,0 +1,7 @@
+.....0.
+..4321.
+..5..2.
+..6543.
+..7..4.
+..8765.
+..9....
diff --git a/input/2024/Aoc2024Day10ex7.txt b/input/2024/Aoc2024Day10ex7.txt
@@ -0,0 +1,7 @@
+..90..9
+...1.98
+...2..7
+6543456
+765.987
+876....
+987....
diff --git a/input/2024/Aoc2024Day10ex8.txt b/input/2024/Aoc2024Day10ex8.txt
@@ -0,0 +1,6 @@
+012345
+123456
+234567
+345678
+4.6789
+56789.
diff --git a/input/2024/Aoc2024Day10ex9.txt b/input/2024/Aoc2024Day10ex9.txt
@@ -0,0 +1,8 @@
+89010123
+78121874
+87430965
+96549874
+45678903
+32019012
+01329801
+10456732
diff --git a/input/2024/Aoc2024Day11.txt b/input/2024/Aoc2024Day11.txt
@@ -0,0 +1 @@
+0 44 175060 3442 593 54398 9 8101095
diff --git a/input/2024/Aoc2024Day11ex1.txt b/input/2024/Aoc2024Day11ex1.txt
@@ -0,0 +1 @@
+0 1 10 99 999
diff --git a/input/2024/Aoc2024Day11ex2.txt b/input/2024/Aoc2024Day11ex2.txt
@@ -0,0 +1 @@
+125 17
diff --git a/puzzles.md b/puzzles.md
@@ -13,8 +13,8 @@
 |[2021](#2021)|![+](https://img.shields.io/badge/stars%20⭐-50-green)       |
 |[2022](#2022)|![+](https://img.shields.io/badge/stars%20⭐-50-green)       |
 |[2023](#2023)|![+](https://img.shields.io/badge/stars%20⭐-50-green)       |
-|[2024](#2024)|![+](https://img.shields.io/badge/stars%20⭐-18-yellow)       |
-|__Total__    |![total](https://img.shields.io/badge/stars%20⭐-468-green)  |
+|[2024](#2024)|![+](https://img.shields.io/badge/stars%20⭐-20-yellow)       |
+|__Total__    |![total](https://img.shields.io/badge/stars%20⭐-472-green)  |
 
 ## Puzzles
 
@@ -312,15 +312,15 @@ Hint from `subreddit` was used for Day 12 part 2, Day 24 part 2 and Day 25.
 |:---:|----|--:|:-----------------------------------------|:--------------------------------------------------------|
 |  +  |2024|  1|Historian Hysteria                        |                                                         |
 |  +  |2024|  2|Red-Nosed Reports                         |                                                         |
-|  +  |2024|  3|Mull It Over                              |                                                         |
+|  +  |2024|  3|Mull It Over                              |parsing                                                  |
 |  +  |2024|  4|Ceres Search                              |                                                         |
 |  +  |2024|  5|Print Queue                               |                                                         |
 |  +  |2024|  6|Guard Gallivant                           |                                                         |
 |  +  |2024|  7|Bridge Repair                             |permutation                                              |
 |  +  |2024|  8|Resonant Collinearity                     |                                                         |
 |  +  |2024|  9|Disk Fragmenter                           |                                                         |
-|  -  |2024| 10|                                          |                                                         |
-|  -  |2024| 11|                                          |                                                         |
+|  +  |2024| 10|Hoof It                                   |BFS                                                      |
+|  +  |2024| 11|Plutonian Pebbles                         |recursion, memoization                                   |
 |  -  |2024| 12|                                          |                                                         |
 |  -  |2024| 13|                                          |                                                         |
 |  -  |2024| 14|                                          |                                                         |
diff --git a/results.md b/results.md
@@ -1,9 +1,9 @@
 # Results for all seasons
 
-* Output of local run using PHP `8.4.1` with `php src/aoc.php` on `2024.12.09`.
+* Output of local run using PHP `8.4.1` with `php src/aoc.php` on `2024.12.11`.
 * Total running time:
     * with AocRunner (PHP + JIT): `133 sec`
-    * with PhpUnit (XDebug + coverage): `39 sec` (less puzzles, 686 tests)
+    * with PhpUnit (XDebug + coverage): `39 sec` (less puzzles, 707 tests)
 
 ```txt
 Advent of Code - batch solution runner, (c) 2024 by TBali
@@ -904,7 +904,15 @@ Advent of Code - batch solution runner, (c) 2024 by TBali
 [ OK ] Puzzle example passed.
 [ OK ] 6332189866718
 [ OK ] 6353648390778
-======= Total: 234 solutions (12 skipped) [time: 133.356 sec; max memory: 1610 MB]
+=== AoC 2024 Day 10 [time: 0.111 sec; memory: 1 Mbytes]    Hoof It
+[ OK ] Puzzle examples (9) passed.
+[ OK ] 674
+[ OK ] 1372
+=== AoC 2024 Day 11 [time: 0.081 sec; memory: 11 Mbytes]   Plutonian Pebbles
+[ OK ] Puzzle examples (2) passed.
+[ OK ] 197157
+[ OK ] 234430066982597
+======= Total: 236 solutions (12 skipped) [time: 147.633 sec; max memory: 1610 MB]
 
 [ OK ] All tests passed.
 ```
diff --git a/src/Aoc2024/Aoc2024Day10.php b/src/Aoc2024/Aoc2024Day10.php
@@ -0,0 +1,105 @@
+<?php
+
+declare(strict_types=1);
+
+namespace TBali\Aoc2024;
+
+use TBali\Aoc\SolutionBase;
+
+/**
+ * AoC 2024 Day 10: Hoof It.
+ *
+ * @see https://adventofcode.com/2024/day/10
+ */
+final class Aoc2024Day10 extends SolutionBase
+{
+    public const YEAR = 2024;
+    public const DAY = 10;
+    public const TITLE = 'Hoof It';
+    public const SOLUTIONS = [674, 1372];
+    public const EXAMPLE_SOLUTIONS = [
+        [36, 0],
+        [1, 0],
+        [2, 0],
+        [4, 0],
+        [3, 0],
+        [0, 3],
+        [0, 13],
+        [0, 227],
+        [0, 81],
+    ];
+
+    /**
+     * Solve both parts of the puzzle for a given input, without IO.
+     *
+     * @param array<int, string> $input The lines of the input, without LF
+     *
+     * @return array<int, string> The answers for Part 1 and Part 2 (as strings)
+     *
+     * @phpstan-return array{string, string}
+     */
+    public function solve(array $input): array
+    {
+        // ---------- Parse input
+        $max_x = strlen($input[0]);
+        if (array_any(array_map(strlen(...), $input), static fn (int $x): bool => $x != $max_x)) {
+            throw new \Exception('grid must be rectangular');
+        }
+        // ---------- Part 1 + 2
+        $ans1 = $this->solvePart($input);
+        $ans2 = $this->solvePart($input, false);
+        return [strval($ans1), strval($ans2)];
+    }
+
+    /**
+     * @param array<int, string> $grid
+     */
+    private function solvePart(array $grid, bool $is_part1 = true): int
+    {
+        $max_y = count($grid);
+        $max_x = strlen($grid[0]);
+        $scores = [];
+        for ($start_y = 0; $start_y < $max_y; ++$start_y) {
+            for ($start_x = 0; $start_x < $max_x; ++$start_x) {
+                if ($grid[$start_y][$start_x] != '0') {
+                    continue;
+                }
+                $start_pos = $start_x | ($start_y << 32);
+                $scores[$start_pos] = 0;
+                $visited = [];
+                $visited[$start_pos] = true;
+                $q = [[$start_x, $start_y, 0]];
+                $idx_read = 0;
+                while ($idx_read < count($q)) {
+                    [$x, $y, $height] = $q[$idx_read];
+                    ++$idx_read;
+                    if ($height == 9) {
+                        ++$scores[$start_pos];
+                        continue;
+                    }
+                    foreach ([[1, 0], [0, 1], [-1, 0], [0, -1]] as [$dx, $dy]) {
+                        $x1 = $x + $dx;
+                        $y1 = $y + $dy;
+                        if ($y1 < 0 || $y1 >= $max_y || $x1 < 0 || $x1 >= $max_x) {
+                            continue;
+                        }
+                        $pos1 = $x1 | ($y1 << 32);
+                        if ($is_part1 and isset($visited[$pos1])) {
+                            continue;
+                        }
+                        $c = $grid[$y1][$x1];
+                        if ($c == '.') {
+                            continue;
+                        }
+                        $height1 = intval($c);
+                        if ($height1 == $height + 1) {
+                            $visited[$pos1] = true;
+                            $q[] = [$x1, $y1, $height1];
+                        }
+                    }
+                }
+            }
+        }
+        return intval(array_sum($scores));
+    }
+}
diff --git a/src/Aoc2024/Aoc2024Day11.php b/src/Aoc2024/Aoc2024Day11.php
@@ -0,0 +1,91 @@
+<?php
+
+declare(strict_types=1);
+
+namespace TBali\Aoc2024;
+
+use TBali\Aoc\SolutionBase;
+
+/**
+ * AoC 2024 Day 11: Plutonian Pebbles.
+ *
+ * @see https://adventofcode.com/2024/day/11
+ */
+final class Aoc2024Day11 extends SolutionBase
+{
+    public const YEAR = 2024;
+    public const DAY = 11;
+    public const TITLE = 'Plutonian Pebbles';
+    public const SOLUTIONS = [197157, 234430066982597];
+    public const EXAMPLE_SOLUTIONS = [[7, 0], [55312, 0]];
+
+    public const MAX_BLINKS_PART1 = 25;
+    public const MAX_BLINKS_PART2 = 75;
+
+    /** @var array<int, int> */
+    private array $memo = [];
+
+    /**
+     * Solve both parts of the puzzle for a given input, without IO.
+     *
+     * @param array<int, string> $input The lines of the input, without LF
+     *
+     * @return array<int, string> The answers for Part 1 and Part 2 (as strings)
+     *
+     * @phpstan-return array{string, string}
+     */
+    public function solve(array $input): array
+    {
+        // ---------- Parse input
+        if (count($input) != 1) {
+            throw new \Exception('input must have a single line');
+        }
+        $data = array_map(intval(...), explode(' ', $input[0]));
+        // ---------- Part 1 + 2
+        if (count($data) == 5) {
+            $max_blinks_part1 = 1;
+        } else {
+            $max_blinks_part1 = self::MAX_BLINKS_PART1;
+        }
+        if (count($data) <= 5) {
+            $max_blinks_part2 = 1;
+        } else {
+            $max_blinks_part2 = self::MAX_BLINKS_PART2;
+        }
+        $this->memo = [];
+        $ans1 = 0;
+        foreach ($data as $stone) {
+            $ans1 += $this->blink($stone, $max_blinks_part1);
+        }
+        $ans2 = 0;
+        foreach ($data as $stone) {
+            $ans2 += $this->blink($stone, $max_blinks_part2);
+        }
+        return [strval($ans1), strval($ans2)];
+    }
+
+    private function blink(int $stone, int $count_blinks): int
+    {
+        if ($count_blinks == 0) {
+            return 1;
+        }
+        $key = $stone | ($count_blinks << 48);
+        if (isset($this->memo[$key])) {
+            return $this->memo[$key];
+        }
+        if ($stone == 0) {
+            $result = $this->blink(1, $count_blinks - 1);
+        } else {
+            $stone_string = strval($stone);
+            if (strlen($stone_string) % 2 == 0) {
+                $divisor = 10 ** intdiv(strlen($stone_string), 2);
+                $result = $this->blink(intdiv($stone, $divisor), $count_blinks - 1)
+                    + $this->blink($stone % $divisor, $count_blinks - 1);
+            } else {
+                $result = $this->blink($stone * 2024, $count_blinks - 1);
+            }
+        }
+        $this->memo[$key] = $result;
+        return $result;
+    }
+}
diff --git a/tests/Aoc2024Test.php b/tests/Aoc2024Test.php

-Original file line number
+Diff line change
@@ @@ -0,0 +1,4 @@ @@
 +0123
 +1234
 +8765
 +9876