发布时间：2016-02-25 04:48:55

int64 u = 10亿; int64 a = 0,  b = 0; for each  x in 10亿个数 { if ( x >= u ) { b += x/u; x = x%u; } a += x; if ( a >= u ) { b += a/u; a = a%u; }} average = b + a/10亿; .........【阅读全文】