2010年Puzzleup数学竞赛−第07题: Neighboring Digits

castelu

Neighboring Digits

    We have a number. All the digits of this number are different from oneanother and all the digits except the first and the last have a greatervalue than the mean of its neighbors (ie. the digits immediately to theleft and to the right).

    What can this number be at maximum?

zyzme

相邻数字

有一个数，各个数字互不相同。除了首位和末位之外，各位的数字都比相邻的数字大（相邻数字就是指紧挨着这个数字左边或右边的数字）。


这样的数字最大是多少？