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) Regular testing and adjustment of salinity amounts are vital for that well-becoming of one's marine lifestyle. Often use a reputable hydrometer or refractometer to measure salinity accurately. i did not wish to go b... https://pearlaquatics.my/4-thing-to-judge-before-you-choose-aquarium-movers/