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critical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 Backyard & Pet Corporation, its subsidiaries, divisions, affiliated and/or associated providers or even the assets of their respective house owners. 回復/查看 兩天 W... https://pearlaquatics.my/8-exotic-discus-fish-set/