2822: 求分数序列和
摘要：解题思路:注意事项:参考代码:我写的：n = int(input())
q = 2; p = 1; a = 0
for i in range(0,n):
a = a + q / p
……
2822: 求分数序列和
```cpp#include#includeusingnamespacestd;intmain(){intn;doublea=1.0,b=2.0,s=0;cin>>n;while(n--){s+=b/a;b=a+b;a=b-a;}cout
万变不离其宗——菲林数列
摘要：解题思路: 递推思路注意事项:参考代码:int main(){ int n; double a=1.0,b=2.0,s=0; scanf("%d",&n); whil……