From ecab14b7920c564d5e29a5ef8df8c29eef6196fb Mon Sep 17 00:00:00 2001
From: Eoghan Conlon <git@eoghanconlon.ie>
Date: Sun, 1 Dec 2024 23:55:21 +0000
Subject: [PATCH] Day 1 Complete

---
 src/Day01.java | 104 +++++++++++++++++++++++++++++++++++++++++++++++++
 src/Main.java  |  33 ++++++++++++++++
 2 files changed, 137 insertions(+)
 create mode 100644 src/Day01.java
 create mode 100644 src/Main.java

diff --git a/src/Day01.java b/src/Day01.java
new file mode 100644
index 0000000..4a01cd4
--- /dev/null
+++ b/src/Day01.java
@@ -0,0 +1,104 @@
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+
+public class Day01 extends Input {
+    private Input input;
+
+    private ArrayList<Integer> list1;
+    private ArrayList<Integer> list2;
+
+    public Day01() throws IOException {
+        input = new Input();
+        input.init("in/Day01");
+    }
+
+    public int Part1_sample(){
+        int rValue = 0;
+        this.list1 = new ArrayList<>();
+        this.list2 = new ArrayList<>();
+
+        sampleParse();
+
+        return p1_work(rValue);
+    }
+
+    public int Part1(){
+        int rValue = 0;
+        this.list1 = new ArrayList<>();
+        this.list2 = new ArrayList<>();
+
+        actualParse();
+
+        return p1_work(rValue);
+    }
+
+    public int Part2_Sample(){
+        this.list1 = new ArrayList<>();
+        this.list2 = new ArrayList<>();
+        HashMap<Integer, Integer> number_count = new HashMap<>();
+        int rValue = 0;
+
+        sampleParse();
+
+        for(int i : this.list1){
+            if(!number_count.containsKey(i)){
+                number_count.put(i, Collections.frequency(this.list2, i));
+            }
+            rValue += number_count.get(i) * i;
+        }
+
+        return rValue;
+    }
+
+    public int Part2(){
+        this.list1 = new ArrayList<>();
+        this.list2 = new ArrayList<>();
+        HashMap<Integer, Integer> number_count = new HashMap<>();
+        int rValue = 0;
+
+        actualParse();
+
+        for(int i : this.list1){
+            if(!number_count.containsKey(i)){
+                number_count.put(i, Collections.frequency(this.list2, i));
+            }
+            rValue += number_count.get(i) * i;
+        }
+
+        return rValue;
+    }
+
+    private void sampleParse(){
+        for(String s: input.getSample_input()){
+            String[] s_arr = s.split(" {2}");
+            this.list1.add(Integer.parseInt(s_arr[0].strip()));
+            this.list2.add(Integer.parseInt(s_arr[1].strip()));
+        }
+    }
+
+    private void actualParse(){
+        for(String s: input.getInput()){
+            String[] s_arr = s.split(" {2}");
+            this.list1.add(Integer.parseInt(s_arr[0].strip()));
+            this.list2.add(Integer.parseInt(s_arr[1].strip()));
+        }
+    }
+
+    private int p1_work(int rValue) {
+        this.list1.sort(null);
+        this.list2.sort(null);
+
+        for(int i = 0; i < this.list1.size(); i += 1){
+            int temp = this.list1.get(i) - this.list2.get(i);
+            if(temp < 0){
+                temp *= -1;
+            }
+            rValue += temp;
+        }
+
+        return rValue;
+    }
+}
diff --git a/src/Main.java b/src/Main.java
new file mode 100644
index 0000000..7066f74
--- /dev/null
+++ b/src/Main.java
@@ -0,0 +1,33 @@
+import java.io.IOException;
+
+public class Main {
+    public static void main(String[] args) throws IOException {
+        System.out.println("Advent of Code 2024");
+        System.out.println("Day 1:");
+        long start = System.currentTimeMillis();
+        Day01 day01 = new Day01();
+        long day01_init = System.currentTimeMillis() - start;
+
+        start = System.currentTimeMillis();
+        int sample_d1_p1_answer = day01.Part1_sample();
+        long day01_p1_sample = System.currentTimeMillis() - start;
+
+        start = System.currentTimeMillis();
+        int d1_p1_answer = day01.Part1();
+        long day01_p1 = System.currentTimeMillis() - start;
+
+        start = System.currentTimeMillis();
+        int sample_d1_p2_answer = day01.Part2_Sample();
+        long day01_p2_sample = System.currentTimeMillis() - start;
+
+        start = System.currentTimeMillis();
+        int d1_p2_answer = day01.Part2();
+        long day01_p2 = System.currentTimeMillis() - start;
+
+        System.out.printf("Day 1 init took %dms", day01_init);
+        System.out.printf("Part 1 sample is: %d (%dms)\n", sample_d1_p1_answer, day01_p1_sample);
+        System.out.printf("Part 1 answer is: %d (%dms)\n", d1_p1_answer, day01_p1);
+        System.out.printf("Part 2 sample answer is: %d (%dms)\n", sample_d1_p2_answer, day01_p2_sample);
+        System.out.printf("Part 2 answer is: %d (%dms)", d1_p2_answer, day01_p2);
+    }
+}