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 will not connect to the server for this app or Web page right now. There could possibly be excessive traffic or maybe a configuration mistake. Attempt yet again later, or Call the app or Internet site operator.... https://pearlaquatics.my/author/sushant/