再用n2的时间（两重循环）枚举d-c，并将b-c的值作为键，在Hash数组中查找是否存在。如果能找到critical相同的node点，则找到了一组满足 D-c = a+b的值。（注意检查a b c d 四个数不重复） 优点是该软件能保存原始数据的所有属性不会丢失，缺点是没有注册的话，不能进行批量处理，但是转换速度很快！ I didn't need to go but my father went on the doorway to discover who was knoking in the doorway. as he was o... https://pearlaquatics.my/author/sushant/page/8/