Complete day 3

src/main/java/com/mattrixwv/adventOfCode24/days/Problem2.java

@@ -15,7 +15,7 @@ public class Problem2 extends Problem{
 
 	public Problem2(){
 		super();
-		description = "Find the similarity score between the two columsn of numbers";
+		description = "Find the similarity score between the two columns of numbers.";
 		result = "Unresolved";
 	}
 

src/main/java/com/mattrixwv/adventOfCode24/days/Problem5.java

@@ -0,0 +1,70 @@
+package com.mattrixwv.adventOfCode24.days;
+
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import com.mattrixwv.Stopwatch;
+
+
+public class Problem5 extends Problem{
+	private static final String inputFileName = "days/Problem5.txt";
+
+
+	public Problem5(){
+		super();
+		description = "Find the non-corrupted multiplication instructions that are allowed to run.";
+		result = "Unresolved";
+	}
+
+	public String runSolution(){
+		Stopwatch timer = new Stopwatch();
+		timer.start();
+
+		int sum = 0;
+		StringBuilder fileInput = new StringBuilder();
+
+
+		//Read the file
+		try(Scanner scanner = new Scanner(this.getClass().getClassLoader().getResourceAsStream(inputFileName))){
+			while(scanner.hasNext()){
+				fileInput.append(scanner.next());
+			}
+		}
+
+		//Pull out the valid references from the file
+		Pattern functionPattern = Pattern.compile("mul\\(\\d{1,3},\\d{1,3}\\)");
+		Matcher functionMatcher = functionPattern.matcher(fileInput.toString());
+		List<String> functions = new ArrayList<>();
+		while(functionMatcher.find()){
+			functions.add(functionMatcher.group());
+		}
+		StringBuilder functionString = new StringBuilder();
+		functions.forEach(func -> functionString.append(func));
+
+		//Perform the required multiplication
+		Pattern digitPattern = Pattern.compile("\\d{1,3}");
+		Matcher digitMatcher = digitPattern.matcher(functionString.toString());
+		while(digitMatcher.find()){
+			int num1 = Integer.parseInt(digitMatcher.group());
+			digitMatcher.find();
+			int num2 = Integer.parseInt(digitMatcher.group());
+			sum += (num1 * num2);
+		}
+
+
+		//Save the results
+		timer.stop();
+		result = "The sum of the non-corrupted multiplication instructions is " + sum + ".\nIt took " + timer.toString() + " to run the algorithm.";
+		return result;
+	}
+}
+
+/*
+Find the non-corrupted multiplication instructions that are allowed to run
+The sum of the non-corrupted multiplication instructions is 168539636.
+It took 13.816 milliseconds to run the algorithm.
+*/

src/main/java/com/mattrixwv/adventOfCode24/days/Problem6.java

@@ -0,0 +1,83 @@
+package com.mattrixwv.adventOfCode24.days;
+
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import com.mattrixwv.Stopwatch;
+
+
+public class Problem6 extends Problem{
+	private static final String inputFileName = "days/Problem5.txt";
+
+
+	public Problem6(){
+		super();
+		description = "Find the non-corrupted multiplication instructions that are allowed to run.";
+		result = "Unresolved";
+	}
+
+	public String runSolution(){
+		Stopwatch timer = new Stopwatch();
+		timer.start();
+
+		int sum = 0;
+		StringBuilder fileInput = new StringBuilder();
+
+
+		//Read the file
+		try(Scanner scanner = new Scanner(this.getClass().getClassLoader().getResourceAsStream(inputFileName))){
+			while(scanner.hasNext()){
+				fileInput.append(scanner.next());
+			}
+		}
+
+		//Pull out the valid references from the file
+		Pattern functionPattern = Pattern.compile("mul\\(\\d{1,3},\\d{1,3}\\)|do\\(\\)|don't\\(\\)");
+		Matcher functionMatcher = functionPattern.matcher(fileInput.toString());
+		List<String> functions = new ArrayList<>();
+		while(functionMatcher.find()){
+			functions.add(functionMatcher.group());
+		}
+
+		//Perform the required multiplication
+		boolean enabled = true;
+		Pattern digitPattern = Pattern.compile("\\d{1,3}");
+		for(String function : functions){
+			if(!enabled){
+				enabled = function.equals("do()");
+			}
+			else{
+				if(function.equals("do()")){
+					continue;
+				}
+				else if(function.equals("don't()")){
+					enabled = false;
+				}
+				else{
+					Matcher digitMatcher = digitPattern.matcher(function);
+					digitMatcher.find();
+					int num1 = Integer.parseInt(digitMatcher.group());
+					digitMatcher.find();
+					int num2 = Integer.parseInt(digitMatcher.group());
+					sum += (num1 * num2);
+				}
+			}
+		}
+
+
+		//Save the results
+		timer.stop();
+		result = "The sum of the non-corrupted multiplication instructions is " + sum + ".\nIt took " + timer.toString() + " to run the algorithm.";
+		return result;
+	}
+}
+
+/*
+Find the non-corrupted multiplication instructions that are allowed to run
+The sum of the non-corrupted multiplication instructions is 97529391.
+It took 4.187 milliseconds to run the algorithm.
+*/