From b4801d6a45d4303b3acbb9bf173e39bb53d0c243 Mon Sep 17 00:00:00 2001
From: Kenneth Sun <kenhtsun@gmail.com>
Date: Fri, 17 Jan 2020 12:49:50 -0500
Subject: [PATCH] I finissshhheeeeedddd..

---
 .idea/workspace.xml           |   4 +++-
 out/production/AOC/Day6.class | Bin 3641 -> 4676 bytes
 src/Day6.java                 |  36 +++++++++++++++++++++++++++++++++-
 test.txt                      |  18 +++++++++++------
 4 files changed, 50 insertions(+), 8 deletions(-)

diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index b181c19..00342c1 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -3,7 +3,9 @@
   <component name="ChangeListManager">
     <list default="true" id="281af794-7651-4ac7-9bc7-923c6c2bb0b4" name="Default Changelist" comment="">
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/Day6_new.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/Day6_new.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/out/production/AOC/Day6.class" beforeDir="false" afterPath="$PROJECT_DIR$/out/production/AOC/Day6.class" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/Day6.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/Day6.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/test.txt" beforeDir="false" afterPath="$PROJECT_DIR$/test.txt" afterDir="false" />
     </list>
     <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
     <option name="SHOW_DIALOG" value="false" />
diff --git a/out/production/AOC/Day6.class b/out/production/AOC/Day6.class
index b80fc9988380fe49af176c736315c40e3de105d8..3ca2fd35012f12d4bf2275a1382c299c72f921d9 100644
GIT binary patch
delta 2284
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delta 1296
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diff --git a/src/Day6.java b/src/Day6.java
index 50868a4..5b4a0d6 100644
--- a/src/Day6.java
+++ b/src/Day6.java
@@ -56,11 +56,45 @@ public static void main(String[] args) throws IOException {
                 if (hasAncestor(o, a)) orbits ++;
             }
         }
-        System.out.println(orbits);
+        System.out.println("Part 1: " + orbits);
+
+        String target = "SAN";
+        System.out.println("Part 2: " + calDis(tree.get("YOU"), tree.get("SAN")));
+
         double endTime = System.currentTimeMillis();
         System.out.println("Time: " + (endTime - startTime) + "ms");
     }
 
+    static int calDis(Node a, Node b){
+        // find first shared ancestor
+
+        List<Node> aParents = new ArrayList<Node>();
+        List<Node> bParents = new ArrayList<Node>();
+        
+        Node curr = a.getParent();
+        for (int i = a.getHeight(); i > 0; i --){
+            aParents.add(curr);
+            curr = curr.getParent();
+        }
+
+        curr = b.getParent();
+        for (int i = b.getHeight(); i > 0; i --){
+            bParents.add(curr);
+            curr = curr.getParent();
+        }
+
+        List<Node> sharedParents = new ArrayList<Node>();
+        for (Node n : aParents){
+            if (bParents.contains(n)){
+                sharedParents.add(n);
+            }
+        }
+
+        Node common = sharedParents.get(0);
+        System.out.println("Common: " + common);
+        return (a.getHeight() - common.getHeight() + b.getHeight() - common.getHeight() - 2);
+    }
+
     static boolean hasAncestor(Node offspring, Node ancestor){
         Node next = offspring.getParent();
         for (int i = 0; i < offspring.getHeight() - ancestor.getHeight(); i++) {
diff --git a/test.txt b/test.txt
index 1f96bb8..77456ed 100644
--- a/test.txt
+++ b/test.txt
@@ -1,7 +1,13 @@
-B)D
-COM)A
-A)B
-A)C
+COM)B
+B)C
+C)D
 D)E
-E)G
-G)F
\ No newline at end of file
+E)F
+B)G
+G)H
+D)I
+E)J
+J)K
+K)L
+K)YOU
+I)SAN
\ No newline at end of file