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 possibly the property of Central Backyard & Pet Organization, its subsidiaries, divisions, affiliated and/or linked corporations or perhaps the property in their respective house owners. 一天 ●... https://pearlaquatics.my/4-steps-to-set-up-a-sobo-fish-tank-at-your-residence/