根据城市的地图，地图中的建筑物都是规则的矩形，地图中建筑物的数据有文本文件给出，包括每个建筑物西南角的坐标，南墙宽度，西墙宽度！求出所有南正视图（从南侧面看整个城市）能够看见的建筑物。-According to city maps, maps of the buildings are rectangular rule, the map data of buildings have a text file is given, including the coordinates of the sou