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crucial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） We can't connect with the server for this application or Site presently. There could be far too much site visitors or maybe a configuration mistake. Try out yet again afterwards, or Make contact with the applicati... https://pearlaquatics.my/shop/page/5/