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) Common screening and adjustment of salinity degrees are crucial for the nicely-getting of the marine daily life. Always use a reliable hydrometer or refractometer to evaluate salinity properly. गड़बड़ियां ठीक की गईं, ... https://pearlaquatics.my/how-to-set-up-your-first-aquarium/