greedy.java

public ArrayList greedy(ArrayList candidates) {
    solution;
    while (!isSolution(solution) && (candidatesLeft(candidates)) {
            cadidate = selectCandidate(candidates);
            removeCandidate(candidate, candidates);
            if (isGoodCandidate(candidate, solution)) {
                addCandidate(candidate, solution);
            }
        }
        if (isSolution(solution)) {
            return solution;
        } else {
            return null;
        }
    }
}