solved day 3

Author: shahata

src/2025/day03.js

@@ -0,0 +1,19 @@
+export function part1(input, batteries = 2) {
+  let lines = input.split("\n").map(line => line.split("").map(Number));
+  let voltage = lines.map(line => {
+    let result = 0;
+    line.push(0);
+    for (let i = batteries; i > 0; i--) {
+      let max = Math.max(...line.slice(0, -1 * i));
+      let index = line.findIndex(x => x === max);
+      line = line.slice(index + 1);
+      result = result * 10 + max;
+    }
+    return result;
+  });
+  return voltage.reduce((a, b) => a + b);
+}
+
+export function part2(input) {
+  return part1(input, 12);
+}

src/2025/day03.test.js

@@ -0,0 +1,45 @@
+import { part1, part2 } from "./day03.js";
+import { describe, test, expect } from "vitest";
+import readInput from "../utils/read-input.js";
+
+let input = readInput(import.meta.url);
+
+describe("day03 2025", () => {
+  describe("part1", () => {
+    test("it should work for part 1 examples", () => {
+      expect(
+        part1(
+          [
+            "987654321111111",
+            "811111111111119",
+            "234234234234278",
+            "818181911112111",
+          ].join("\n"),
+        ),
+      ).toEqual(357);
+    });
+
+    test("it should work for part 1 input", () => {
+      expect(part1(input)).toEqual(17229);
+    });
+  });
+
+  describe("part2", () => {
+    test("it should work for part 2 examples", () => {
+      expect(
+        part2(
+          [
+            "987654321111111",
+            "811111111111119",
+            "234234234234278",
+            "818181911112111",
+          ].join("\n"),
+        ),
+      ).toEqual(3121910778619);
+    });
+
+    test("it should work for part 2 input", () => {
+      expect(part2(input)).toEqual(170520923035051);
+    });
+  });
+});

src/2025/day03.txt

@@ -22,7 +22,7 @@ <h1 class="title-global"><a href="index.html">Advent of Code</a></h1>
         </nav>
         <div class="user">Shahar Talmi <a class="supporter-badge" title="Advent of Code Supporter">(AoC++)</a> <a
             href="https://www.wix.engineering/" target="_blank" class="sponsor-badge"
-            title="Member of sponsor: Wix Engineering">(Sponsor)</a> <span class="star-count">4*</span></div>
+            title="Member of sponsor: Wix Engineering">(Sponsor)</a> <span class="star-count">6*</span></div>
       </div>
       <div>
         <h1 class="title-event">&nbsp;&nbsp;&nbsp;<span class="title-event-wrap">$year=</span><a
@@ -32,7 +32,7 @@ <h1 class="title-event">&nbsp;&nbsp;&nbsp;<span class="title-event-wrap">$year=<
     <main>
       <article>
 <p>From here, you can access all of the events (and the corresponding puzzles, leaderboards, stats, etc) ever run on Advent of Code:</p>
-<div class="eventlist-event"><a href="../2025/solver.html">[2025]</a> <span class="star-count"> 4*</span> <span class="quiet">/ 24*</span> <a  class="supporter-badge" title="Advent of Code Supporter">(AoC++)</a></div>
+<div class="eventlist-event"><a href="../2025/solver.html">[2025]</a> <span class="star-count"> 6*</span> <span class="quiet">/ 24*</span> <a  class="supporter-badge" title="Advent of Code Supporter">(AoC++)</a></div>
 <div class="eventlist-event"><a href="../2024/solver.html">[2024]</a> <span class="star-count">50*</span> <span class="quiet">/ 50*</span> <a  class="supporter-badge" title="Advent of Code Supporter">(AoC++)</a></div>
 <div class="eventlist-event"><a href="../2023/solver.html">[2023]</a> <span class="star-count">50*</span> <span class="quiet">/ 50*</span> <a  class="supporter-badge" title="Advent of Code Supporter">(AoC++)</a></div>
 <div class="eventlist-event"><a href="../2022/solver.html">[2022]</a> <span class="star-count">50*</span> <span class="quiet">/ 50*</span> <a  class="supporter-badge" title="Advent of Code Supporter">(AoC++)</a></div>
@@ -43,7 +43,7 @@ <h1 class="title-event">&nbsp;&nbsp;&nbsp;<span class="title-event-wrap">$year=<
 <div class="eventlist-event"><a href="../2017/solver.html">[2017]</a> <span class="star-count">50*</span> <span class="quiet">/ 50*</span> <a  class="supporter-badge" title="Advent of Code Supporter">(AoC++)</a></div>
 <div class="eventlist-event"><a href="../2016/solver.html">[2016]</a> <span class="star-count">50*</span> <span class="quiet">/ 50*</span> <a  class="supporter-badge" title="Advent of Code Supporter">(AoC++)</a></div>
 <div class="eventlist-event"><a href="../2015/solver.html">[2015]</a> <span class="star-count">50*</span> <span class="quiet">/ 50*</span> <a  class="supporter-badge" title="Advent of Code Supporter">(AoC++)</a></div>
-<p>Total stars: <span class="star-count">504*</span></article>
+<p>Total stars: <span class="star-count">506*</span></article>
     </main>
   </body>
 </html>

src/2025/events.html

@@ -22,7 +22,7 @@ <h1 class="title-global"><a href="index.html">Advent of Code</a></h1>
         </nav>
         <div class="user">Shahar Talmi <a class="supporter-badge" title="Advent of Code Supporter">(AoC++)</a> <a
             href="https://www.wix.engineering/" target="_blank" class="sponsor-badge"
-            title="Member of sponsor: Wix Engineering">(Sponsor)</a> <span class="star-count">4*</span></div>
+            title="Member of sponsor: Wix Engineering">(Sponsor)</a> <span class="star-count">6*</span></div>
       </div>
       <div>
         <h1 class="title-event">&nbsp;&nbsp;&nbsp;<span class="title-event-wrap">$year=</span><a
@@ -31,29 +31,33 @@ <h1 class="title-event">&nbsp;&nbsp;&nbsp;<span class="title-event-wrap">$year=<
     </header>
     <main>
       <p>Starting this year, there will be <a href="/2025/about#faq_num_days">12 days</a> of puzzles each December.</p><style>
-.calendar .calendar-color-v { color: #b6f; }
 .calendar .calendar-color-a { color: #999; }
-.calendar .calendar-color-n { color: #9b715b; }
+.calendar .calendar-color-t { color: #32211a; }
+.calendar .calendar-color-v { color: #b6f; }
+.calendar .calendar-color-k { color: #666; }
+.calendar .calendar-color-o { color: #f90; }
 .calendar .calendar-color-y { color: #ff6; }
-.calendar .calendar-color-r { color: #f00; }
 .calendar .calendar-color-w { color: #fff; }
 .calendar .calendar-color-u { color: #06f; }
-.calendar .calendar-color-m { color: #abc; }
+.calendar .calendar-color-r { color: #f00; }
 .calendar .calendar-color-Y { color: #ff6; text-shadow: 0 0 5px #ff6, 0 0 10px #ff6, 0 0 15px #ff6; }
-.calendar .calendar-color-t { color: #32211a; }
-.calendar .calendar-color-o { color: #f90; }
+.calendar .calendar-color-n { color: #9b715b; }
+.calendar .calendar-color-m { color: #abc; }
+.calendar .calendar-color-g { color: #0f0; }
 </style>
-<pre class="calendar"><a aria-label="Day 1, two stars" href="https://github.com/shahata/adventofcode-solver/blob/main/src/2025/day01.js" class="calendar-day1 calendar-verycomplete">  <span class="calendar-color-w">.</span> <span class="calendar-color-w">'</span>    <span class="calendar-color-w">____</span> <span class="calendar-color-w">'</span> <span class="calendar-color-w">.'</span> <span class="calendar-color-w">.'</span> <span class="calendar-color-w">'</span> <span class="calendar-color-Y">*</span>   <span class="calendar-color-w">'.</span>        <span class="calendar-color-w">'</span>  <span class="calendar-color-o">&lt;</span><span class="calendar-color-w">o</span>  <span class="calendar-color-w">'.'.</span>       
+<pre class="calendar"><a aria-label="Day 1, two stars" href="https://github.com/shahata/adventofcode-solver/blob/main/src/2025/day01.js" class="calendar-day1 calendar-verycomplete">         <span class="calendar-color-w">____</span> <span class="calendar-color-w">''</span> <span class="calendar-color-w">'..</span> <span class="calendar-color-w">.</span>  <span class="calendar-color-Y">*</span>    <span class="calendar-color-w">''</span>  <span class="calendar-color-w">.</span>     <span class="calendar-color-w">.</span> <span class="calendar-color-o">&lt;</span><span class="calendar-color-w">o</span>  <span class="calendar-color-w">'</span> <span class="calendar-color-w">.</span>        
 <span class="calendar-color-w">________/</span><span class="calendar-color-a">O___</span><span class="calendar-color-w">\__________</span><span class="calendar-color-r">|</span><span class="calendar-color-w">_________________O______</span>  <span class="calendar-day"> 1</span> <span class="calendar-mark-complete">*</span><span class="calendar-mark-verycomplete">*</span></a>
-<a aria-label="Day 2, two stars" href="https://github.com/shahata/adventofcode-solver/blob/main/src/2025/day02.js" class="calendar-day2 calendar-verycomplete">   <span class="calendar-color-a">_______</span><span class="calendar-color-m">||</span><span class="calendar-color-a">_________</span>                                   
-<span class="calendar-color-t">.</span>  <span class="calendar-color-a">|</span> <span class="calendar-color-n">_</span><span class="calendar-color-v">@</span><span class="calendar-color-n">__</span> <span class="calendar-color-m">||</span> <span class="calendar-color-n">_</span><span class="calendar-color-u">o</span><span class="calendar-color-n">_</span>  <span class="calendar-color-r">'.</span><span class="calendar-color-a">|</span>_ _________________________   <span class="calendar-day"> 2</span> <span class="calendar-mark-complete">*</span><span class="calendar-mark-verycomplete">*</span></a>
-<span aria-hidden="true" class="calendar-day3">   <span class="calendar-color-a">|_</span><span class="calendar-color-r">&amp;</span><span class="calendar-color-a">_</span><span class="calendar-color-y">%</span><span class="calendar-color-a">__</span><span class="calendar-color-m">||</span><span class="calendar-color-a">_</span><span class="calendar-color-u">o</span><span class="calendar-color-o">o</span><span class="calendar-color-a">__</span><span class="calendar-color-m">^</span><span class="calendar-color-n">=</span><span class="calendar-color-a">_</span><span class="calendar-color-n">[</span> \|     _    .. .. ..     |        
-                     \_]__--|_|___[]_[]_[]__//_|   <span class="calendar-day"> 3</span><span id="calendar-countdown"></span><script>
+<a aria-label="Day 2, two stars" href="https://github.com/shahata/adventofcode-solver/blob/main/src/2025/day02.js" class="calendar-day2 calendar-verycomplete">   <span class="calendar-color-a">_______</span><span class="calendar-color-m">||</span><span class="calendar-color-a">_________</span>  <span class="calendar-color-t">'</span> <span class="calendar-color-t">.</span>     <span class="calendar-color-t">.</span> <span class="calendar-color-t">'</span>  <span class="calendar-color-t">.</span>  <span class="calendar-color-t">.</span> <span class="calendar-color-t">.</span>  <span class="calendar-color-t">.''.'</span>       
+   <span class="calendar-color-a">|</span> <span class="calendar-color-n">_</span><span class="calendar-color-v">@</span><span class="calendar-color-n">__</span> <span class="calendar-color-m">||</span> <span class="calendar-color-n">_</span><span class="calendar-color-u">o</span><span class="calendar-color-n">_</span>  <span class="calendar-color-r">'.</span><span class="calendar-color-a">|_</span> <span class="calendar-color-a">_________________________</span>   <span class="calendar-day"> 2</span> <span class="calendar-mark-complete">*</span><span class="calendar-mark-verycomplete">*</span></a>
+<a aria-label="Day 3, two stars" href="https://github.com/shahata/adventofcode-solver/blob/main/src/2025/day03.js" class="calendar-day3 calendar-verycomplete"> <span class="calendar-color-t">'</span> <span class="calendar-color-a">|_</span><span class="calendar-color-r">&amp;</span><span class="calendar-color-a">_</span><span class="calendar-color-y">%</span><span class="calendar-color-a">__</span><span class="calendar-color-m">||</span><span class="calendar-color-a">_</span><span class="calendar-color-u">o</span><span class="calendar-color-o">o</span><span class="calendar-color-a">__</span><span class="calendar-color-m">^</span><span class="calendar-color-n">=</span><span class="calendar-color-a">_</span><span class="calendar-color-n">[</span> <span class="calendar-color-a">\|</span><span class="calendar-color-g">..'</span>  <span class="calendar-color-m">_</span>    <span class="calendar-color-r">.</span><span class="calendar-color-k">.</span> <span class="calendar-color-r">.</span><span class="calendar-color-k">.</span> <span class="calendar-color-r">.</span><span class="calendar-color-k">.</span>     <span class="calendar-color-a">|</span>        
+                     <span class="calendar-color-a">\_</span><span class="calendar-color-m">]</span><span class="calendar-color-a">__</span><span class="calendar-color-n">--</span><span class="calendar-color-m">|_|</span><span class="calendar-color-a">___</span><span class="calendar-color-m">[]</span><span class="calendar-color-a">_</span><span class="calendar-color-m">[]</span><span class="calendar-color-a">_</span><span class="calendar-color-m">[]</span><span class="calendar-color-a">__</span><span class="calendar-color-m">//</span><span class="calendar-color-a">_|</span>   <span class="calendar-day"> 3</span> <span class="calendar-mark-complete">*</span><span class="calendar-mark-verycomplete">*</span></a>
+<span aria-hidden="true" class="calendar-day4">                               ____________//___        
+                               | \        // @@|   <span class="calendar-day"> 4</span><span id="calendar-countdown"></span><script>
 (function(){
 var countdown = document.getElementById("calendar-countdown");
 if (!countdown) return;
-var server_eta = 85909;
-var key = "2025-3-"+server_eta;
+var server_eta = 84602;
+var key = "2025-4-"+server_eta;
 var now = Math.floor(new Date().getTime()/1000);
 var target = server_eta + now;
 if (sessionStorage) {
@@ -76,8 +80,8 @@ <h1 class="title-event">&nbsp;&nbsp;&nbsp;<span class="title-event-wrap">$year=<
     countdown.textContent = "";
 
     var a = document.createElement("a");
-    a[String.fromCharCode(104,114,101,102)] = "/2025" + String.fromCharCode(47,100,97,121,47) + "3";
-    a.className = "calendar-day3 calendar-day-new";
+    a[String.fromCharCode(104,114,101,102)] = "/2025" + String.fromCharCode(47,100,97,121,47) + "4";
+    a.className = "calendar-day4 calendar-day-new";
     var span = countdown.parentNode;
     while (span.firstChild) {
       a.appendChild(span.firstChild);
@@ -99,9 +103,7 @@ <h1 class="title-event">&nbsp;&nbsp;&nbsp;<span class="title-event-wrap">$year=<
 update_countdown();
 })();
 </script></span>
-<span aria-hidden="true" class="calendar-day4">                                                        
-                                                   <span class="calendar-day"> 4</span></span>
-<span aria-hidden="true" class="calendar-day5">                                                        
+<span aria-hidden="true" class="calendar-day5">                               |_[#]_@@__//_@@@|        
                                                    <span class="calendar-day"> 5</span></span>
 <span aria-hidden="true" class="calendar-day6">                                                        
                                                    <span class="calendar-day"> 6</span></span>

src/2025/index.html

@@ -22,7 +22,7 @@ <h1 class="title-global"><a href="index.html">Advent of Code</a></h1>
         </nav>
         <div class="user">Shahar Talmi <a class="supporter-badge" title="Advent of Code Supporter">(AoC++)</a> <a
             href="https://www.wix.engineering/" target="_blank" class="sponsor-badge"
-            title="Member of sponsor: Wix Engineering">(Sponsor)</a> <span class="star-count">4*</span></div>
+            title="Member of sponsor: Wix Engineering">(Sponsor)</a> <span class="star-count">6*</span></div>
       </div>
       <div>
         <h1 class="title-event">&nbsp;&nbsp;&nbsp;<span class="title-event-wrap">$year=</span><a