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crucial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） With Zoom Earth you can monitor the development of hurricanes and storms, keep track of wildfires and smoke, and stay aware of the most up-to-date conditions by viewing satellite imagery and rain radar updated in ... https://pearlaquatics.my/how-to-install-a-discus-aquarium-setup/