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key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） All trademarks are possibly the residence of Central Garden & Pet Company, its subsidiaries, divisions, affiliated and/or related providers or perhaps the house of their respective owners. 一周 ● Each family has their... https://pearlaquatics.my/how-is-an-aquarium-set-up/