给定N（1≤N≤32767）天的营业额a1,a2,a3,……an. 定义最小波动值：该天的最小波动值=min{|该天以前某一天的营业额-该天营业额|}. 特别地，第一天的最小波动值即为a1.　　试求N天的最小波动值之和。-Given N (1 ≤ N ≤ 32767) day turnover a1, a2, a3, ... ... an. Defines the minimum volatility value: the smallest fluctuations in the value of the day = min {| one day before the day s turnover- the day turnover |}. in particular, the first day shall be the minimum fluctuations in the value of a1. find the N-day fluctuations in value and the minimum.