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key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） Live crops tend to be more than simply ornamental aspects in the freshwater aquarium. They lead to oxygenation, aid sustain water quality, and supply purely natural habitats for fish. 查看 時間: 全部時間 ● उपयोगकर्ता ... https://pearlaquatics.my/product/nt-lab-swimbladder-100ml/