---
title: "L1-068 调和平均"
created: 2025-11-28
tags:
  - 算法
---

# L1-068 调和平均

## 题目 [L1-068 调和平均](https://pintia.cn/problem-sets/994805046380707840/exam/problems/type/7?problemSetProblemId=1336215880692482051&page=0)

![[image-954bc3f0.png]]

## 思路分析

## 代码实现

```cpp
 #include<bits/stdc++.h>

using namespace std;

#define endl '\n'

using ll = long long;

using ull = unsigned long long;

using PII = pair<int,int>;

using Pll = pair<ll,ll>;

int dx[4]={-1,0,1,0},dy[4]={0,1,0,-1};

const int inf = 0x3f3f3f3f;

int main(){

	ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);

	//倒数之和 除以n 的结果 取倒数

	int n;cin>>n;

	double sum=0;

	for(int i=0;i<n;i++){

		double tmp;cin>>tmp;

		sum+=1/tmp;

	}

	double ans=sum/n;

	printf("%.2f",1/ans);

	return 0;

}
```

## 同类题型

## 视频讲解

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