public void union(T x, T y) {
		T representativeX = element2representative.get(x);
		T representativeY = element2representative.get(y);

		for(T element : element2representative.keySet()) {
			if(!element2representative.get(element).equals(representativeY)) {
				continue;
			}
			element2representative.put(element, representativeX);
		}
		// TODO Homework 2.1
	}