From 212785c447ffbe4310648d93c88483aeadf7ae56 Mon Sep 17 00:00:00 2001
From: PascalWo <pwolff.de@gmail.com>
Date: Mon, 4 Jul 2022 09:59:41 +0200
Subject: [PATCH 1/3] test for day1 part two

---
 .../adventofcode/days/day01/Day01Test.java       | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/test/java/org/haffson/adventofcode/days/day01/Day01Test.java b/src/test/java/org/haffson/adventofcode/days/day01/Day01Test.java
index c9c773b5..68cceda8 100644
--- a/src/test/java/org/haffson/adventofcode/days/day01/Day01Test.java
+++ b/src/test/java/org/haffson/adventofcode/days/day01/Day01Test.java
@@ -42,4 +42,20 @@ public void test_firstPart_returnsExpectedResult() {
         //assert
         Assert.assertEquals(expectedResult, actualResult);
     }
+
+    @Test
+    public void test_secondPart_returnsExpectedResult() {
+        //arrange
+        Day01 day01 = new Day01(fileReaders);
+        when(fileReaders.getInputArray("src/main/resources/puzzle_input/day1_input.txt"))
+                .thenReturn(new ArrayList<>(Arrays.asList(3,3,4,-2,-4)));
+
+        String expectedResult = "Part 2 - Frequency: " + 10;
+
+        //act
+        String actualResult = day01.secondPart();
+
+        //assert
+        Assert.assertEquals(expectedResult, actualResult);
+    }
 }

From 9fd7caed25648f3a78526fb6392bd3f18d396b73 Mon Sep 17 00:00:00 2001
From: PascalWo <pwolff.de@gmail.com>
Date: Mon, 4 Jul 2022 10:00:01 +0200
Subject: [PATCH 2/3] result for day1 part 2

---
 .../adventofcode/days/day01/Day01.java        | 24 +++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

diff --git a/src/main/java/org/haffson/adventofcode/days/day01/Day01.java b/src/main/java/org/haffson/adventofcode/days/day01/Day01.java
index 101b15c8..fb053633 100644
--- a/src/main/java/org/haffson/adventofcode/days/day01/Day01.java
+++ b/src/main/java/org/haffson/adventofcode/days/day01/Day01.java
@@ -7,6 +7,7 @@
 import org.springframework.stereotype.Component;
 
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.List;
 
 /**
@@ -29,7 +30,7 @@ public class Day01 implements Days {
         this.fileReaders = fileReaders;
         this.problemStatus = new HashMap<>();
         this.problemStatus.put("1", ProblemStatusEnum.SOLVED);
-        this.problemStatus.put("2", ProblemStatusEnum.UNSOLVED);
+        this.problemStatus.put("2", ProblemStatusEnum.SOLVED);
     }
 
     @Override
@@ -51,7 +52,8 @@ public String firstPart() {
 
     @Override
     public String secondPart() {
-        return null;
+        String fileName = "src/main/resources/puzzle_input/day1_input.txt";
+        return "Part 2 - Frequency: " + calculateFrequencyPart2(fileReaders.getInputArray(fileName));
     }
 
     /**
@@ -65,4 +67,22 @@ private int calculateFrequency(List<Integer> myIntArrayList) {
                 .mapToInt(Integer::intValue)
                 .sum();
     }
+
+    private int calculateFrequencyPart2(List<Integer> myIntArrayList){
+        int sum = 0;
+        HashSet<Integer> found = new HashSet<>();
+        boolean foundDuplicate = false;
+        while (!foundDuplicate) {
+            for (int f : myIntArrayList) {
+                sum += f;
+                if (found.contains(sum)) {
+                    foundDuplicate = true;
+                    break;
+                } else {
+                    found.add(sum);
+                }
+            }
+        }
+        return sum;
+    }
 }

From 86e862a8fa95663358e0c0698e513c51fb8b7158 Mon Sep 17 00:00:00 2001
From: PascalWo <pwolff.de@gmail.com>
Date: Mon, 4 Jul 2022 11:03:26 +0200
Subject: [PATCH 3/3] refactored variable names

---
 .../org/haffson/adventofcode/days/day01/Day01.java   | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/main/java/org/haffson/adventofcode/days/day01/Day01.java b/src/main/java/org/haffson/adventofcode/days/day01/Day01.java
index fb053633..017510a7 100644
--- a/src/main/java/org/haffson/adventofcode/days/day01/Day01.java
+++ b/src/main/java/org/haffson/adventofcode/days/day01/Day01.java
@@ -69,20 +69,20 @@ private int calculateFrequency(List<Integer> myIntArrayList) {
     }
 
     private int calculateFrequencyPart2(List<Integer> myIntArrayList){
-        int sum = 0;
-        HashSet<Integer> found = new HashSet<>();
+        int sumOfLookedUpListEntries = 0;
+        HashSet<Integer> previousSums = new HashSet<>();
         boolean foundDuplicate = false;
         while (!foundDuplicate) {
             for (int f : myIntArrayList) {
-                sum += f;
-                if (found.contains(sum)) {
+                sumOfLookedUpListEntries += f;
+                if (previousSums.contains(sumOfLookedUpListEntries)) {
                     foundDuplicate = true;
                     break;
                 } else {
-                    found.add(sum);
+                    previousSums.add(sumOfLookedUpListEntries);
                 }
             }
         }
-        return sum;
+        return sumOfLookedUpListEntries;
     }
 }