advent of code challenge, 2022 day 25.

src/Week11/App.java

@@ -1,3 +1,8 @@
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Scanner;
+import java.io.File;
+
 public class App {
 
     /**
@@ -19,7 +24,34 @@ public class App {
      * @return starting number of the longest Collatz Sequence
      */
     private static int collatzSequence() {
-        return 1; // TODO
+        int n = 1;
+        int maxChain = 0;
+        int correctNum = 0;
+
+        while (n < 1_000_000) {
+            int chainLength = collatz(n, 0);
+
+            if (chainLength > maxChain) {
+                maxChain = chainLength;
+                correctNum = n;
+            }
+
+            n--;
+        }
+
+        System.out.println(correctNum);
+        return correctNum;
+    }
+
+    private static int collatz(int n, int chainLength) {
+        if(n == 1) return ++chainLength; // Base case and final link.
+
+        if(n % 2 == 0) n /= 2;
+        else n = (3 * n) + 1;
+
+        ++chainLength;
+
+        return collatz(n, chainLength);
     }
 
     /**
@@ -60,17 +92,65 @@ public class App {
      * @return the total of the name scores.
      */
     private static int nameScores() {
-        return 1; // TODO
+        ArrayList<String> names = readNames();
+        int sum = 0;
+
+        Collections.sort(names);
+
+        int counter = 1;
+        for (String name : names) {
+            int nameScore = 0;
+            char[] n = name.toCharArray();
+            for (char c : n) {
+                nameScore += (c - 64);
+            }
+
+            nameScore *= counter;
+            sum+= nameScore;
+
+            counter++;
+        }
+
+        System.out.println("sum of name scores: " + sum);
+        return sum;
+    }
+
+    private static ArrayList<String> readNames() {
+        ArrayList<String> list = new ArrayList<>();
+
+        File f = new File("names.txt");
+
+        try (Scanner scan = new Scanner(f)) {
+            String str = scan.nextLine();
+
+            String[] strings = str.split(",");
+
+            for (String s : strings)
+                list.add(s.substring(1, s.length() - 1));
+
+        } catch (Exception e) {
+            System.out.println("Error reading file.");
+        }
+
+        return list;
+    }
+
+    private static void printNames(ArrayList<String> names) {
+        for (String name : names)
+            System.out.println(name);
     }
 
     public static void main(String[] args) {
+        //System.out.println(collatz(13, 0));
         if(collatzSequence() != 837799) System.out.println("Your solution is incorrect...");
         else System.out.println("Your Collatz Sequence solution is correct!");
 
+        /*
         if(countingSundays() != 171) System.out.println("Your solution is incorrect...");
         else System.out.println("Your Counting Sundays solution is correct!");
 
         if(nameScores() != 871198282) System.out.println("Your solution is incorrect...");
         else System.out.println("Your Name Scores solution is correct!");
+        */
     }
 }

src/Week11/run

@@ -2,3 +2,5 @@
 
 javac *.java
 java App
+
+rm *.class

src/Week13/App.java

@@ -1,5 +0,0 @@
-public class App {
-    public static void main(String[] args) {
-        Gui g = new Gui();
-    }
-}

src/Week13/Button.java

@@ -1,48 +0,0 @@
-import javax.swing.*;
-import javax.swing.border.*;
-
-import java.awt.*;
-import java.awt.event.*;
-import java.awt.Color;
-
-public class Button extends JButton {
-    private boolean selected;
-    private Color bg;
-    private Color fg;
-
-    /**
-     * @param String buttonLabel
-     * @param Color fg
-     * @param Color bg
-     */
-    public Button(String buttonLabel, Color bg, Color fg) {
-        super(buttonLabel);
-            this.bg = bg;
-            this.fg = fg;
-
-        applyCommon();
-        deselect();
-    }
-
-    // Apply default appearance to the button upon exiting the bounds.
-    public void deselect() {
-        selected = false;
-        setBackground(bg);
-        setForeground(fg);
-    }
-
-    // Apply focused appearance to the button upon hover.
-    public void select() {
-        selected = true;
-        setBackground(fg);
-        setForeground(bg);
-    }
-
-    // Apply hover functionality to all buttons, as well as removing certain default stylings.
-    private void applyCommon() {
-        // TODO: Implement hover functionality.
-
-        setFocusPainted(false);
-        setBorder(new EmptyBorder(3,3,3,3));
-    }
-}

src/Week13/Gui.java

@@ -1,28 +0,0 @@
-import javax.swing.*;
-
-import java.awt.*;
-
-public class Gui extends JFrame {
-    public Gui() {
-        super("Java Swing Challenge");
-            init();
-
-        add(new Panel(Color.DARK_GRAY, Color.WHITE));
-
-        setVisible(true);
-    }
-
-    private void init() {
-        setDefaultCloseOperation(EXIT_ON_CLOSE);
-        setLayout(new BorderLayout());
-        setSize(new Dimension(750, 550));
-        setResizable(false);
-        setLocationRelativeTo(null);
-
-        try {
-            UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
-        } catch (Exception e) {
-            System.out.println("Error with cross platform look and feel.");
-        }
-    }
-}

src/Week13/Input.txt

@@ -0,0 +1,128 @@
+1-201-=2
+210--1211001
+120
+1==1-=1=-1=-=1-==-
+1--
+1-1-2221=-
+1021=
+2-=-21==02
+1-
+1-222122-0==020
+1-20122---12=2112-2=
+221
+12=220-2-=1=
+21
+1-20
+1-0=-0-2---
+10-=221=-0102
+212-020-1=00
+201=020=-1=
+2=0=01=2==
+2=1=0=11-2===20--
+2-0-221
+1--10=--1-0-2
+100=-11222=1
+11-=1
+11=--=1012--02-
+121
+1=11=1
+1==2---002--11=-1-
+11=0==--0
+2==0110=2=1==
+221=-=-=-02
+12-10
+2=
+2-0-=2
+1=0-0=2
+10==-2210=-=202
+2=-21
+2=-=1220
+201=2==1
+1==1=00-1-=
+1200-00-00-21-=-=0
+1=0=-22-200=-2-=--
+1==-=--12-1112-22
+1=0=-00====102
+20222010-1
+1---
+20--==2-201-
+1=1
+120=02=-=1-0=1
+1=-210-1=1
+1110--2
+1102-1=2----201=-
+1=01=2-01
+12=2--0-1001
+12=1
+102
+2=1=-11
+12=001022
+2=1=1=-01==
+101---=1--
+10=00001-0122=0
+12=-=--11=112=0202
+1-122====012100
+212=020=1022-0
+10=22=2
+1===212-02=1
+2=-2===-01010-121
+122=10
+2-0-1=-0--1001=-2
+1121
+1-21--100=1=2=1=2-
+1==0
+1=-0=0-2=0-=1===0
+2-02-==
+20-=-2022===-222
+1=1100-1
+12=-1=-02-2-20-=1-=
+10=
+1=1-==2
+101-=01221-==-2-=-
+12-=111=2=11-=1212
+12==202=121
+22022=000-121001-
+12=2
+1==0==1--1
+222
+10
+12-0122=01-
+10-0=01120
+210-0===-011=-=12=
+1=-1=0=2-102--0
+10111000--0-===0
+1=0-=-2-
+2-==22100
+1-2=-2-1-020=-2-
+1=001-1=02=--2
+1==0-211-21=-
+1-02=2=--221=-012==
+1-011-221-0=
+10-20=
+1=-0--=
+10-=022101=1--22
+2-0-1202==-==-
+1=0-
+11=
+2200
+2-22-212==-0==2=
+1012
+1=2=12===2-=
+1==211-02-
+1-001==2101220
+2-001
+10-=2-=
+102110==21=12--02
+1-=1122212002=010
+1-10-201=221=021-
+2-00=2221
+2--1
+11=12=0
+2-21=-
+20--2-1=22220-0
+2=22=1-02=21
+10==10112=1
+1-2=0=0=02==
+2201=2
+10-=00121
+10-012-12

src/Week13/Panel.java

@@ -1,20 +0,0 @@
-import javax.swing.*;
-
-import java.awt.*;
-
-public class Panel extends JPanel {
-    private Color bg;
-    private Color fg;
-
-    public Panel(Color bg, Color fg) {
-        super();
-            this.bg = bg;
-            this.fg = fg;
-
-        init();
-    }
-
-    private void init() {
-        // TODO: Add 2 buttons to the Panel object, and set the background and foreground colors.
-    }
-}

src/Week13/SNAFU.java

@@ -0,0 +1,83 @@
+import java.io.BufferedReader;
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.Iterator;
+
+/**
+ * Provides code for the input and testing of the SNAFU Challenge. This
+ * challenge and input is from Day 25, year 2022 from AdventOfCode.com.
+ */
+public class SNAFU {
+	/**
+	 * 
+	 * @return returns an Iterable form of the input.
+	 */
+	public static Iterable<String> iterableInput() {
+		return new Input();
+	}
+
+	/**
+	 * Classes that implement Iterable tell Java that the class can be trusted to
+	 * have an Iterator. A very common and nice use is in for loops. See, Arrays and
+	 * a number of other datastructures implement Iterable, and you can stick any
+	 * Iterable class in the for-each loop.
+	 */
+	private static class Input implements Iterable<String> {
+		/**
+		 * This is the only method required by Iterable.
+		 */
+		@Override
+		public Iterator<String> iterator() {
+			return new SNAFUIterator();
+		}
+
+		/**
+		 * This is the manual version of the for each loop. There are two methods
+		 * inside. Next() gives the next input (and iterates). HasNext() is called
+		 * before to check if Next() can be safely run. The for loop basically keeps
+		 * calling Next() while HasNext() is true. Next() is actually the input given to
+		 * the left half of the for each loop.
+		 * 
+		 * In this case, this Iterator keeps going until the next line it has ready is
+		 * null.
+		 */
+		private class SNAFUIterator implements Iterator<String> {
+			private final static String PATH = "Input.txt";
+
+			private BufferedReader reader;
+			private String currLine;
+
+			private SNAFUIterator() {
+				try {
+					reader = new BufferedReader(new FileReader(PATH));
+					iterateToNextLine();
+				} catch (FileNotFoundException e) {
+					System.out.println("File Not Found");
+					e.printStackTrace();
+				}
+			}
+
+			private void iterateToNextLine() {
+				try {
+					currLine = reader.readLine();
+				} catch (IOException e) {
+					System.out.println("Error With Reader");
+					e.printStackTrace();
+				}
+			}
+
+			@Override
+			public boolean hasNext() {
+				return (currLine != null);
+			}
+
+			@Override
+			public String next() {
+				String returnStr = currLine;
+				iterateToNextLine();
+				return returnStr;
+			}
+		}
+	}
+}

src/Week13/SNAFUChallenge.java

@@ -0,0 +1,35 @@
+/**
+ * Full Instructions and Explanation: https://adventofcode.com/2022/day/25
+ * 
+ * Find the SNAFU sum of the SNAFUInput.txt file.
+ */
+public class SNAFUChallenge {
+	public static void main(String[] args) {
+        String expectedSnafu = "2-02===-21---2002==0";
+
+		long sum = 0;
+		for (String lineOfSNAFU : SNAFU.iterableInput()) {
+			System.out.println(lineOfSNAFU);
+			sum += decode(lineOfSNAFU);
+		}
+
+		System.out.println("=== RESULT ===");
+		System.out.println("result           : " + encode(sum));
+        System.out.println("expected result  : " + expectedSnafu);
+	}
+
+	private static String encode(long num) {
+        return ""; // TODO: Convert a long into SNAFU.
+	}
+
+	/**
+	 * The easy part. Go right to left on the SNAFU string and add the number to the
+	 * sum. Translates from SNAFU base-5 to base-10.
+	 * 
+	 * @param SNAFU The SNAFU base-5 number code to decode.
+	 * @return The base-10 result
+	 */
+	private static long decode(String SNAFU) {
+        return 0l; // TODO: Convert a String of SNAFU into a long.
+	}
+}

src/Week13/run

@@ -1,6 +1,6 @@
 #!/bin/zsh
 
 javac *.java
-java App
+java SNAFUChallenge
 
 rm *.class