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 can't connect to the server for this application or Internet site at this time. There could be a lot of targeted visitors or perhaps a configuration mistake. Test all over again later, or Get in touch with the... https://pearlaquatics.my/aquarium-tank-fish-mate-trial-and-test-your-perfect-tank-mates/