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 logos are either the assets of Central Back garden & Pet Organization, its subsidiaries, divisions, affiliated and/or connected companies or perhaps the house of their respective proprietors. 查看 時間: 全部... https://pearlaquatics.my/how-to-set-up-your-first-aquarium/