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important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 emblems are both the property of Central Backyard garden & Pet Enterprise, its subsidiaries, divisions, affiliated and/or relevant providers or the property of their respective proprietors. 三個月 返 回 Your... https://pearlaquatics.my/aquarium-tank-fish-mate-trial-and-test-your-perfect-tank-mates/