85,774,741,839+71058122759=156,832,864,598,
156,832,864,598/2=78,416,432,299太大了,
85,774,741,839-14,716,619,081=71,058,122,758,
56,341,503,678+50,245,680,460=106,587,184,138,
106,587,184,138/2=53,293,592,069,
53,293,592,069+14,716,619,081=68,010,211,150 这个也是低于实际的,此方法效果不好。
|