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crucial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 both the home of Central Backyard & Pet Enterprise, its subsidiaries, divisions, affiliated and/or related businesses or even the house of their respective entrepreneurs. 查看 時間: 全部時間 Commemor... https://pearlaquatics.my/how-do-aquarists-benefit-from-a-good-aquarium-shop/