import?java.util.Comparator;
import?java.util.HashMap;
import?java.util.Iterator;
import?java.util.TreeMap;


public?class?ShopCart?{
	private?TreeMap?map?;
	

	public?ShopCart（）?{
		map?=?new?TreeMap（）;
	}
	public?void?add（Goods?goodsint?number）{
		if（map.containsKey（goods））{
			int?num?=?map.get（goods）;
			map.put（goods?num+number）;
		}else{
			map.put（goods?number）;
		}
	}
	public?void?delete（String?name）{
		Iterator?it?=?map.keySet（）.iterator（）;
		
		Goods?b?=?null;
		w