Editing 2015 Dec Bronze Problem 1 Fence Painting (section)

=== Java ===
<pre>
import java.io.*;
import java.util.*;

public class Paint {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new FileReader("paint.in"));
        PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter("paint.out")));

        StringTokenizer st = new StringTokenizer(br.readLine());
        int segment1Start = Integer.parseInt(st.nextToken());
        int segment1End = Integer.parseInt(st.nextToken());

        st = new StringTokenizer(br.readLine());
        int segment2Start = Integer.parseInt(st.nextToken());
        int segment2End = Integer.parseInt(st.nextToken());

        int paintedLength;

        // Checking overlap scenarios
        if(segment2Start >= segment1End) {
            // No overlap
            paintedLength = (segment1End - segment1Start) + (segment2End - segment2Start);
        }
        else if(segment2End > segment1End) {
            // Partial overlap with segment2 exceeding segment1
            paintedLength = segment2End - segment1Start;
        }
        else {
            // Full overlap where segment2 is completely inside segment1
            paintedLength = segment1End - segment1Start;
        }
        
        pw.println(paintedLength);
        pw.close();
    }
}

</pre>