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important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 both the house of Central Back garden & Pet Business, its subsidiaries, divisions, affiliated and/or linked organizations or perhaps the assets of their respective house owners. ● सीधे ऐप में ... https://pearlaquatics.my/tips-to-follow-when-installing-a-fish-tank-malaysia/