package util.graph;

import java.util.HashSet;
import java.util.PriorityQueue;
import java.util.Set;

public class DynDjikstra {
    public static State FindShortest(Node start, Node target) {
        PriorityQueue<Node> openSet = new PriorityQueue<>();
        Set<Node> closedSet = new HashSet<>();
        openSet.add(start);
        while (!openSet.isEmpty()) {
            Node current = openSet.poll();
            for (Edge edge : current.edges) {
                Node end = edge.target;
                if (closedSet.contains(end)) {
                    continue;
                }
                State newState = edge.travel(current.last);
                //if (end.equals(target)) {
                    //return newState;
                //}
                if (openSet.contains(end)) {
                    if (end.last.compareTo(newState)>0) {
                        end.last = newState;
                    }
                } else {
                    openSet.add(end);
                    end.last = newState;
                }
            }
            closedSet.add(current);
            if (closedSet.contains(target)) {
                return target.last;
            }
        }

        return target.last;
    }
}

package de.johanneslauber.codejam;

import java.io.IOException;

/**
 * 
 * @author Johannes Lauber - joh.lauber@googlemail.com
 * 
 */
public class Main {

	/**
	 * @author Johannes Lauber - joh.lauber@googlemail.com
	 * @param Args
	 */
	public static void main(String[] Args) {
		// solveProblem("input/A-small-practice.in", "StoreCredit");
		// solveProblem("input/A-large-practice.in", "StoreCredit");
		// solveProblem("input/B-small-practice.in", "ReverseWords");
		// solveProblem("input/B-large-practice.in", "ReverseWords");
		// solveProblem("input/C-small-practice.in", "T9Spelling");
		// solveProblem("input/C-large-practice.in", "T9Spelling");
		// solveProblem("input/A-small-practice.in", "SpeakinginTongues");
		solveProblem("input/B-small-attempt.in", "DancingGooglers");
	}

	/**
	 * 
	 * @author Johannes Lauber - joh.lauber@googlemail.com
	 * @param fileName
	 * @param problemName
	 */
	private static void solveProblem(String fileName, String problemName) {
		CaseProvider caseProvider = new CaseProvider();
		try {
			try {
				caseProvider.importFile(
						fileName,
						Class.forName("de.johanneslauber.codejam.model.impl."
								+ problemName + "Case"));

				caseProvider.solveCases(Class
						.forName("de.johanneslauber.codejam.model.impl."
								+ problemName + "Problem"));
			} catch (ClassNotFoundException e) {
				System.out.println("Error finding implemented Case: "
						+ e.getMessage());
			} catch (InstantiationException e) {
				e.printStackTrace();
			} catch (IllegalAccessException e) {
				e.printStackTrace();
			}
		} catch (IOException e) {
			System.out.println("Error reading file: " + e.getMessage());
		}
	}
}