.

04/src/main.java

@@ -0,0 +1,51 @@
+ import java.io.IOException;
+import java.io.RandomAccessFile;
+
+public class main {
+
+	public static void main(String[] args) {
+		
+		try {
+			RandomAccessFile file = new RandomAccessFile("Input.txt", "r");
+			String str;
+			
+			int indexOfSeperator = 0, indexOfFirstDash = 0, indexOfSecondDash = 0;
+			int sectionBeginningElf1, sectionEndingElf1, sectionBeginningElf2, sectionEndingElf2;
+			int countPart1 = 0, countPart2 = 0;
+      
+			while ((str = file.readLine()) != null) {
+				indexOfSeperator = str.indexOf(",");
+				indexOfFirstDash = str.indexOf("-");
+				indexOfSecondDash = str.indexOf("-", indexOfFirstDash+1);
+				
+				sectionBeginningElf1 = Integer.valueOf(str.substring(0, indexOfFirstDash));
+				sectionEndingElf1 = Integer.valueOf(str.substring(indexOfFirstDash+1,indexOfSeperator));
+				sectionBeginningElf2 = Integer.valueOf(str.substring(indexOfSeperator+1, indexOfSecondDash));
+				sectionEndingElf2 = Integer.valueOf(str.substring(indexOfSecondDash+1));
+				
+				//  Part 1
+				if ((sectionBeginningElf1 <= sectionBeginningElf2 && sectionEndingElf1 >= sectionEndingElf2)
+				|| (sectionBeginningElf2 <= sectionBeginningElf1 && sectionEndingElf2 >= sectionEndingElf1)) {
+					countPart1++;
+				}
+				
+				// Part 2
+				if (between(sectionBeginningElf1, sectionBeginningElf2, sectionEndingElf2) || between(sectionEndingElf1, sectionBeginningElf2, sectionEndingElf2) || between(sectionBeginningElf2, sectionBeginningElf1, sectionEndingElf1) || between(sectionEndingElf2, sectionBeginningElf1, sectionEndingElf1)) {
+					countPart2++;
+				}
+				
+				//System.out.println(sectionBeginningElf1 + " " + sectionEndingElf1 + " - " + sectionBeginningElf2 + " " + sectionEndingElf2);
+			}
+			System.out.println("Part 1: " + countPart1);
+			System.out.println("Part 2: " + countPart2);
+			file.close();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+	
+	public static boolean between(int variable, int minValueInclusive, int maxValueInclusive) {
+	    return variable >= minValueInclusive && variable <= maxValueInclusive;
+	}
+
+}