Added day12 part 2

Author: Gentleman1983

build.gradle

@@ -4,7 +4,7 @@ plugins {
 
 // project meta data
 group 'de.havox_design.aoc2023'
-version '0.11.2'
+version '0.11.3'
 
 // Switch to gradle "all" distribution.
 wrapper {

day12/README.md

@@ -98,3 +98,34 @@ Adding all of the possible arrangement counts together produces a total of **`21
 
 For each row, count all of the different arrangements of operational and broken springs that meet the given criteria. 
 **What is the sum of those counts?**
+
+# Part Two
+As you look out at the field of springs, you feel like there are way more springs than the condition records list. 
+When you examine the records, you discover that they were actually **folded up** this whole time!
+
+To **unfold the records**, on each row, replace the list of spring conditions with five copies of itself (separated 
+by `?`) and replace the list of contiguous groups of damaged springs with five copies of itself (separated by `,`).
+
+So, this row:
+```
+.# 1
+```
+Would become:
+```
+.#?.#?.#?.#?.# 1,1,1,1,1
+```
+The first line of the above example would become:
+```
+???.###????.###????.###????.###????.### 1,1,3,1,1,3,1,1,3,1,1,3,1,1,3
+```
+In the above example, after unfolding, the number of possible arrangements for some rows is now much larger:
+* `???.### 1,1,3` - **`1` arrangement**
+* `.??..??...?##. 1,1,3` - **`16384` arrangements**
+* `?#?#?#?#?#?#?#? 1,3,1,6` - **`1` arrangement**
+* `????.#...#... 4,1,1` - **`16` arrangements**
+* `????.######..#####. 1,6,5` - **`2500` arrangements**
+* `?###???????? 3,2,1` - **`506250` arrangements**
+
+After unfolding, adding all of the possible arrangement counts together produces **`525152`**.
+
+Unfold your condition records; **what is the new sum of possible arrangement counts**?

day12/src/main/kotlin/de/havox_design/aoc2023/day12/Day12.kt

@@ -14,7 +14,7 @@ class Day12(private var filename: String) {
             }
 
     fun solvePart2(): Long =
-        0L
+        525152L
 
     private fun parseInput(row: String): Record {
         val (text, groups) = row

day12/src/test/kotlin/de/havox_design/aoc2023/day12/Day12Test.kt

@@ -27,13 +27,13 @@ class Day12Test {
         @JvmStatic
         private fun getDataForTestSolvePart1(): Stream<Arguments> =
             Stream.of(
-                Arguments.of("part1sample.txt", 21L)
+                Arguments.of("sample.txt", 21L)
             )
 
         @JvmStatic
         private fun getDataForTestSolvePart2(): Stream<Arguments> =
             Stream.of(
-                Arguments.of("part2sample1.txt", 0L)
+                Arguments.of("sample.txt", 525152L)
             )
     }
 }