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 residence of Central Yard & Pet Company, its subsidiaries, divisions, affiliated and/or connected firms or maybe the home in their respective owners. 排序: 發帖時間 ● Every single fam... https://pearlaquatics.my/what-are-the-pros-cons-of-keeping-discus-fish/