标题: 2010年Puzzleup数学竞赛−第18题:Three Digits [打印本页] 作者: zyzme 时间: 2010-12-19 18:10 标题: 2010年Puzzleup数学竞赛−第18题:Three Digits Three Digits
You have a number where any numeral appears at most twice.
The sum of all neighboring three digits in this number is a square number.
What is the maximum possible value for this number?
Example: 74504 is such a number because no numeral appears more than twice and 7+4+5, 4+5+0 and 5+0+4 are square numbers.作者: zyzme 时间: 2011-1-21 15:16
三个数字