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 won't connect to the server for this app or Web site presently. There could possibly be too much targeted visitors or possibly a configuration mistake. Consider yet again afterwards, or Get hold of the app or w... https://pearlaquatics.my/product/sobo4x2x2/