add day 7, 21 + dummy files

Author: Timucin Merdin

src/main/java/2k21/aoc21/Day10.java

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+package aoc21;
+
+import java.io.File;
+import java.util.List;
+
+import utils.StaticUtils;
+
+public class Day10 {
+	
+	
+	public Day10(File file) {
+		
+	}
+	
+	private int run1() {
+		
+		
+		
+		
+		
+		return 0;
+	}
+	
+	private int run2() {
+		
+		
+		
+		
+		
+		return 0;
+	}
+
+	public static void main(String[] args) {
+		Day10 test = new Day10(new File("C:\\Users\\tmerdin\\aoc\\aoc21\\day8\\InputFile2.txt"));
+		System.out.println(test.run1());
+		System.out.println(test.run2());
+	}
+
+
+
+}

src/main/java/2k21/aoc21/Day11.java

@@ -0,0 +1,41 @@
+package aoc21;
+
+import java.io.File;
+import java.util.List;
+
+import utils.StaticUtils;
+
+public class Day11 {
+	
+	
+	public Day11(File file) {
+		
+	}
+	
+	private int run1() {
+		
+		
+		
+		
+		
+		return 0;
+	}
+	
+	private int run2() {
+		
+		
+		
+		
+		
+		return 0;
+	}
+
+	public static void main(String[] args) {
+		Day11 test = new Day11(new File("C:\\Users\\tmerdin\\aoc\\aoc21\\day8\\InputFile2.txt"));
+		System.out.println(test.run1());
+		System.out.println(test.run2());
+	}
+
+
+
+}

src/main/java/2k21/aoc21/Day12.java

@@ -0,0 +1,41 @@
+package aoc21;
+
+import java.io.File;
+import java.util.List;
+
+import utils.StaticUtils;
+
+public class Day12 {
+	
+	
+	public Day12(File file) {
+		
+	}
+	
+	private int run1() {
+		
+		
+		
+		
+		
+		return 0;
+	}
+	
+	private int run2() {
+		
+		
+		
+		
+		
+		return 0;
+	}
+
+	public static void main(String[] args) {
+		Day12 test = new Day12(new File("C:\\Users\\tmerdin\\aoc\\aoc21\\day8\\InputFile2.txt"));
+		System.out.println(test.run1());
+		System.out.println(test.run2());
+	}
+
+
+
+}

src/main/java/2k21/aoc21/Day13.java

@@ -0,0 +1,41 @@
+package aoc21;
+
+import java.io.File;
+import java.util.List;
+
+import utils.StaticUtils;
+
+public class Day13 {
+	
+	
+	public Day13(File file) {
+		
+	}
+	
+	private int run1() {
+		
+		
+		
+		
+		
+		return 0;
+	}
+	
+	private int run2() {
+		
+		
+		
+		
+		
+		return 0;
+	}
+
+	public static void main(String[] args) {
+		Day13 test = new Day13(new File("C:\\Users\\tmerdin\\aoc\\aoc21\\day8\\InputFile2.txt"));
+		System.out.println(test.run1());
+		System.out.println(test.run2());
+	}
+
+
+
+}

src/main/java/2k21/aoc21/Day14.java

@@ -0,0 +1,41 @@
+package aoc21;
+
+import java.io.File;
+import java.util.List;
+
+import utils.StaticUtils;
+
+public class Day14 {
+	
+	
+	public Day14(File file) {
+		
+	}
+	
+	private int run1() {
+		
+		
+		
+		
+		
+		return 0;
+	}
+	
+	private int run2() {
+		
+		
+		
+		
+		
+		return 0;
+	}
+
+	public static void main(String[] args) {
+		Day14 test = new Day14(new File("C:\\Users\\tmerdin\\aoc\\aoc21\\day8\\InputFile2.txt"));
+		System.out.println(test.run1());
+		System.out.println(test.run2());
+	}
+
+
+
+}

src/main/java/2k21/aoc21/Day7.java

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+package aoc21;
+
+import java.io.File;
+import java.util.Comparator;
+import java.util.List;
+
+import utils.StaticUtils;
+
+public class Day7 {
+	
+	private List<Integer> nums;
+
+	public Day7(File file) {
+		nums = StaticUtils.commaSeperatedIntegerFileToList(file);
+		nums.sort(Comparator.naturalOrder());
+	}
+	
+	private int run1() {
+		
+		
+		int optimalDistance = 0;
+		
+		// optimalDistance = median
+		int n = nums.size();
+		if(nums.size() % 2 == 0) {
+			optimalDistance = nums.get((n + 1) / 2 - 1);
+		} else {
+			optimalDistance = (nums.get((n + 1) / 2 - 1) + nums.get(n / 2)) / 2;
+		}
+		
+		final int finalOptimalDistance = optimalDistance;
+		int fuel = nums.stream().mapToInt(num -> Math.abs(num - finalOptimalDistance)).sum();
+		
+		return fuel;
+	}
+	
+	// brute force with gauss sum
+	private long run2() {
+		
+		int max = nums.get(nums.size() - 1);
+		
+		long fuel = 0;
+		long minFuel = Integer.MAX_VALUE;
+		for(int i = 1; i < max; i++) {
+			
+			for(int num : nums) {
+				int distance = Math.abs(num - i);
+				fuel += (((int) Math.pow(distance, 2) + distance)) / 2;
+			}
+			
+			if(minFuel > fuel) {
+				minFuel = fuel;
+				fuel = 0;
+			}
+			
+		}
+		
+		
+		
+		return minFuel;
+	}
+
+	public static void main(String[] args) {
+		Day7 test = new Day7(new File("C:\\Users\\tmerdin\\aoc\\aoc21\\day7\\InputFile1.txt"));
+		System.out.println(test.run1());
+		System.out.println(test.run2());
+	}
+
+
+
+}

src/main/java/2k21/aoc21/Day8.java

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+package aoc21;
+
+import java.io.File;
+import java.util.List;
+
+import utils.StaticUtils;
+
+public class Day8 {
+	
+	
+	public Day8(File file) {
+		
+	}
+	
+	private int run1() {
+		
+		
+		
+		
+		
+		return 0;
+	}
+	
+	private int run2() {
+		
+		
+		
+		
+		
+		return 0;
+	}
+
+	public static void main(String[] args) {
+		Day8 test = new Day8(new File("C:\\Users\\tmerdin\\aoc\\aoc21\\day8\\InputFile2.txt"));
+		System.out.println(test.run1());
+		System.out.println(test.run2());
+	}
+
+
+
+}

src/main/java/2k21/aoc21/Day9.java

@@ -0,0 +1,41 @@
+package aoc21;
+
+import java.io.File;
+import java.util.List;
+
+import utils.StaticUtils;
+
+public class Day9 {
+	
+	
+	public Day9(File file) {
+		
+	}
+	
+	private int run1() {
+		
+		
+		
+		
+		
+		return 0;
+	}
+	
+	private int run2() {
+		
+		
+		
+		
+		
+		return 0;
+	}
+
+	public static void main(String[] args) {
+		Day9 test = new Day9(new File("C:\\Users\\tmerdin\\aoc\\aoc21\\day8\\InputFile2.txt"));
+		System.out.println(test.run1());
+		System.out.println(test.run2());
+	}
+
+
+
+}