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） When you Earlier created your Tiplr account making use of Instagram, we kindly ask for that you alter your login obtain using among the options down below, to be able to preserve using your Tiplr account with you... https://pearlaquatics.my/what-should-be-your-first-steps-to-set-up-an-aquarium/