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） With Zoom Earth you may monitor the event of hurricanes and storms, keep an eye on wildfires and smoke, and stay mindful of the latest disorders by viewing satellite imagery and rain radar up to date in in the vicin... https://pearlaquatics.my/product/sobo-t8-led-discolour-submersible-lamp-double-row/