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import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.IOException;
public class Main {
public static void main(String[] args) throws IOException {
DataInputStream in = new DataInputStream(new FileInputStream("Main.class"));
int start = in.readInt();
if (start != 0xcafebabe) {
System.out.println("not valid");
}
in.close();
System.out.println(in.readUnsignedShort()+"/"+in.readUnsignedShort());
}
}
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