clarkdo

import java.util.ArrayList;
import java.util.List;

public class TravelCost {

    private final static Integer[][] participants = {{500, 700}, {200, 600}, {400, 500}, {600, 200}, {500,300}};
    private final static int cityAmount = participants[0].length;
    private final static List<Integer> result = new ArrayList<>();

    public static void main(String[] args) {

clarkdo

import java.util.LinkedList;

public class DepthSearch {

    private static final String START = "B";
    private static final String END = "E";

    public static void main(String[] args) {
        // this graph is directional
        Graph graph = new Graph();

clarkdo

import com.google.common.collect.Lists;

import java.util.ArrayList;
import java.util.List;

public class SearchInList {

    public static final ArrayList<List<String>> LIST = Lists.newArrayList(
        Lists.newArrayList("a", "b"),
        Lists.newArrayList("c", "d"),