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 are able to track the event of hurricanes and storms, watch wildfires and smoke, and keep mindful of the newest situations by viewing satellite imagery and rain radar updated in near serious‑ti... https://pearlaquatics.my/author/sushant/page/3/