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） We will not connect to the server for this application or Internet site at this time. There may very well be too much site visitors or a configuration error. Check out once again afterwards, or Call the applicati... https://pearlaquatics.my/how-is-an-aquarium-set-up/