AOC 2025 day 3

Author: TheCK

adventofcode/README.md

@@ -1658,16 +1658,16 @@
 [20242402tests]: src/test/java/org/ck/adventofcode/year2024/Day24Test.java
 [20242501tests]: src/test/java/org/ck/adventofcode/year2024/Day25Test.java
 
-# 2025 (4/24)
+# 2025 (6/24)
 
 |        # | Name                                        | Solution                             | Test                              |
 |---------:|---------------------------------------------|:------------------------------------:|:---------------------------------:|
 | 20250101 | [Day 1: Secret Entrance][20250101]          | ✅[💾][20250101solution] | ✅[💾][20250101tests] |
 | 20250102 | [Day 1: Secret Entrance - Part 2][20250102] | ✅[💾][20250102solution] | ✅[💾][20250102tests] |
 | 20250201 | [Day 2: Gift Shop][20250201]                | ✅[💾][20250201solution] | ✅[💾][20250201tests] |
 | 20250202 | [Day 2: Gift Shop - Part 2][20250202]       | ✅[💾][20250202solution] | ✅[💾][20250202tests] |
-| 20250301 | [Day 3: ][20250301]                         | [💾][20250301solution]        | [💾][20250301tests]        |
-| 20250302 | [Day 3:  - Part 2][20250302]                | [💾][20250302solution]        | [💾][20250302tests]        |
+| 20250301 | [Day 3: Lobby ][20250301]                   | ✅[💾][20250301solution] | ✅[💾][20250301tests] |
+| 20250302 | [Day 3: Lobby  - Part 2][20250302]          | ✅[💾][20250302solution] | ✅[💾][20250302tests] |
 | 20250401 | [Day 4: ][20250401]                         | [💾][20250401solution]        | [💾][20250401tests]        |
 | 20250402 | [Day 4:  - Part 2][20250402]                | [💾][20250402solution]        | [💾][20250402tests]        |
 | 20250501 | [Day 5: ][20250501]                         | [💾][20250501solution]        | [💾][20250501tests]        |

adventofcode/src/main/java/org/ck/adventofcode/year2025/Day03.java

@@ -6,29 +6,53 @@
 
 @Solution(
     id = 20250301,
-    name = "Day 3: ",
+    name = "Day 3: Lobby ",
     url = "https://adventofcode.com/2025/day/3",
-    category = "2025",
-    solved = false)
+    category = "2025")
 @Solution(
     id = 20250302,
-    name = "Day 3:  - Part 2",
+    name = "Day 3: Lobby  - Part 2",
     url = "https://adventofcode.com/2025/day/3#part2",
-    category = "2025",
-    solved = false)
+    category = "2025")
 public class Day03 extends AOCSolution {
 
   @Override
   protected void runPartOne(final Scanner in) {
-    run(in);
+    run(in, 2);
   }
 
   @Override
   protected void runPartTwo(final Scanner in) {
-    run(in);
+    run(in, 12);
   }
 
-  private void run(final Scanner in) {
-    // not yet implemented
+  private void run(final Scanner in, final int numberOfBatteries) {
+    long jolts = 0;
+
+    while (in.hasNextLine()) {
+      final String line = in.nextLine();
+
+      long currentJolts = 0;
+      int startIndex = 0;
+      for (int battery = numberOfBatteries - 1; battery >= 0; --battery) {
+        int maxValue = 0;
+        int maxIndex = startIndex;
+        for (int i = startIndex; i < line.length() - battery; ++i) {
+          final int value = line.charAt(i) - '0';
+
+          if (value > maxValue) {
+            maxValue = value;
+            maxIndex = i;
+          }
+        }
+
+        startIndex = maxIndex + 1;
+        currentJolts += maxValue * (long) Math.pow(10, battery);
+      }
+
+      jolts += currentJolts;
+    }
+
+    print(jolts);
   }
 }

adventofcode/src/test/java/org/ck/adventofcode/year2025/Day03Test.java

@@ -1,11 +1,9 @@
 package org.ck.adventofcode.year2025;
 
 import org.ck.adventofcode.util.BaseAOCTest;
-import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.ValueSource;
 
-@Disabled
 class Day03Test extends BaseAOCTest {
   @ParameterizedTest
   @ValueSource(strings = {"01a"})

adventofcode/src/test/resources/org/ck/adventofcode/year2025/day03/01.result.txt

@@ -0,0 +1 @@
+17435

adventofcode/src/test/resources/org/ck/adventofcode/year2025/day03/01.txt

@@ -0,0 +1 @@
+357

adventofcode/src/test/resources/org/ck/adventofcode/year2025/day03/01a.result.txt

@@ -0,0 +1,4 @@
+987654321111111
+811111111111119
+234234234234278
+818181911112111

adventofcode/src/test/resources/org/ck/adventofcode/year2025/day03/01a.txt

@@ -0,0 +1 @@
+172886048065379

adventofcode/src/test/resources/org/ck/adventofcode/year2025/day03/02.result.txt

@@ -0,0 +1 @@
+3121910778619