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vital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 case you Earlier made your Tiplr account employing Instagram, we kindly ask for that you change your login entry applying one of the choices underneath, so that you can continue to keep utilizing your Tiplr accou... https://pearlaquatics.my/how-to-maintain-a-small-fish-tank/