import java.util.*;
import java.awt.*;
import java.applet.*;
import java.lang.Math.*;

import Permutation;

public class Reversal {
	// Data members
	private int m_start;
	private int m_end;
	
	public Reversal(int start, int end) {
		m_start = start;
		m_end = end;
	}
	public String toString(Permutation p, boolean reversal_done) {
		try {
			int from, to;
			if(reversal_done) {
				from = p.getIndex(m_end);
				to = p.getIndex(m_start);
			} else {
				from = p.getIndex(m_start);
				to = p.getIndex(m_end);
			}
			return new String(from + " to " + to); 
		} catch(Exception e) { return ""; }
	}

	// Return the reversal by position
	public String toString() {
			return new String("from position " + m_start + " to position " + m_end); 
	}
	public int getStart() { return m_start; }
	public int getEnd() { return m_end; }	
}