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） All trademarks are both the house of Central Garden & Pet Business, its subsidiaries, divisions, affiliated and/or related companies or maybe the property in their respective homeowners. 兩天 The community of smart ... https://pearlaquatics.my/aquarium-tank-fish-mate-trial-and-test-your-perfect-tank-mates/