摘要： 我滴头啊~晕啊晕。这题终于让我把数位DP的本质看清楚了。http://acm.fzu.edu.cn/problem.php?pid=2109题目Problem DescriptionOne integer number x is called "Mountain Number" if:(1) x>0 and x is an integer;(2) Assume x=a[0]a[1]...a[len-2]a[len-1](0≤a[i]≤9, a[0] is positive). Any a[2i+1] is larger or equal to a[2i] and a[ 阅读全文