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vital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 hook up with the server for this app or Web page right now. There is likely to be too much targeted traffic or possibly a configuration mistake. Try out again later, or Call the app or Web page owner. https://pearlaquatics.my/4-thing-to-judge-before-you-choose-aquarium-movers/