直接按照题意来推导最后的结果就行了。 开始的时候只做到了第一个推导，第二次没有继续下去。 代码： #include<stdio.h>int main(){int T, n, i;double a, aa, sum, temp, ans;scanf("%d", &T);while(T--){scanf("%d", &n);scanf("%lf", &first);scanf

d  Simple calculations  The Problem There is a sequence of n+2 elements a0, a1,…, an+1 (n <= 3000; -1000 <=  ai 1000). It is known that ai = (ai–1 + ai+1)/2 – ci   for each i=1, 2, ..., n.

Simple calculations  The Problem There is a sequence of n+2 elements a0, a1,…, an+1 (n <= 3000; -1000 <=  ai 1000). It is known that ai = (ai–1 + ai+1)/2 – ci   for each i=1, 2, ..., n. You

10014 - Simple calculations Time limit: 3.000 seconds http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=99&page=show_problem&problem=955 The Problem There is a s