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vital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 either the house of Central Yard & Pet Company, its subsidiaries, divisions, affiliated and/or associated firms or perhaps the assets of their respective proprietors. 查看 時間: 全部時間 ● ऐसे समय... https://pearlaquatics.my/8-fish-pond-maintenance-tips/