Is there an integer n such that the sum of the (decimal) digits of n is 1000 and the sum of the squares of the digits is 10002?
全蘇數學奧林匹克：求整數
於德利 (2007-12-28 17:38:03) 評論 (1)Is there an integer n such that the sum of the (decimal) digits of n is 1000 and the sum of the squares of the digits is 10002?