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 either the residence of Central Garden & Pet Corporation, its subsidiaries, divisions, affiliated and/or associated corporations or the house in their respective homeowners. ● सीधे ऐप में वीडियो बनाए... https://pearlaquatics.my/4-hacks-to-maintain-your-kintons-aquarium-like-a-pro/