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essential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） In the event you Beforehand produced your Tiplr account employing Instagram, we kindly request that you modify your login accessibility working with one of the choices below, as a way to retain utilizing your Ti... https://pearlaquatics.my/author/sushant/page/5/