#include<bits/stdc++.h>//万能头 #include<iostream//cin，cout #include<iomanip 》//cout<<fixed<<setprecision(n){位数保留} #include<cmath》//函数 /#include<math.h>/ #include<cstdio》//scanf,printf //#include<stdio.h> int a,sum=0,ans=0,num=0; long long b; float c; char d; bool e; double f; long double g,k; short h; long j; using namespace std; int main() { cin>>a>>b>>c>>d>>e>>f>>g>>h>>j; //scanf("%d,%ll,%f,%c,%b,%do,%ld,%s,%l",&a,&b,&c,&d,&e,&f,&g,&h,&j); if (a+b+c+d+e+f+g+h+j==/<,>,<=,>=/k){int p; for(int i;i<=num;i--){sum=sum+ans++; } cout<<p; /printf("%d\n",p);/} return 0; } 防伪标识：//dongliyang6666666666666666666skhjkfgjgkjhfgjDV //没有工具包 谁敢抄？？？？？？？？？？？

#include<iostream> #include<iomanip> using namespace std; int main(){ double n,m,x; cin>>n; for(int i=1;i<=n;i++){ cin>>m; x+=m; } cout<<fixed<<setprecision(4); cout<<x/n<<endl; return 0; }

#include<iostream> #include<iomanip> using namespace std; int main() { int n double a,b =0 cin>>n for(int i =1;i<=n;i++) { cin>>a b= b + a } cout<<fixed<<setpeciion(4)<<b/n return 0; } 不 要 抄！！！！！！！！！！ 肯 定 会 错！

#include<cstdio>
#include<cstdlib>
#include<cmath>
#include<cctype>
#include<cstring>
#include<string>
#include<vector>
#include<set>
#include<stack>
#include<queue>
#include<iostream>
#include<iomanip>
#include<ctime>
#include<algorithm>
#include<map>
// const int MAXN=1e5;
// double sz[MAXN];
using namespace std;

int main(){
    int a;
    double ans;
    scanf("%d",&a);
    for(int i=1;i<=a;i++){
        double in;
        scanf("%lf",&in);
        ans+=in;
    }
    double out=ans/a;
    printf("%.4f",out);
}

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
	long long n;
	double sum=0;
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		double t;
		cin>>t;
		sum=sum+t;
	}
	cout<<fixed<<setprecision(4)<<sum/n;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main(){
	double a,b,c;
	cin>>a;
	for(int i=1;i<=a;i++)
	{
		cin>>b;
		c+=b;
	}
	cout<<fixed<<setprecision(4)<<c/a<<endl;
}
//钟鼎皓👾

🆘

#include<iostream>
#include<iomanip>
using namespace std;
int main(){
	double a,b,c;
	cin>>a;
	for(int i=1;i<=a;i++)
	{
		cin>>b;
		c+=b;
	}
	cout<<fixed<<setprecision(4)<<c/a<<endl;
}

#include <iostream>

using namespace std;

int main(){

int n;

cin>>n;

double t;

double num=0;

for(int i=1;i<=n;i++){

cin>>t;

num+=t;

} double y=num/n;

printf("%.4lf",y);

} //比水门还水的题

#include <bits/stdc++.h> using namespace std; int main() { cout << "I don't know！"; return 0; }

#include<iostream> #include<iomanip> using namespace std; int main(){ double a,b,c; cin>>a; for(int i=1;i<=a;i++) { cin>>b; c+=b; } cout<<fixed<<setprecision(4)<<c/a<<endl; }

#include<iostream>
#include<iomanip>
using namespace std;
int main(){
	double a,b,c;
	cin>>a;
	for(int i=1;i<=a;i++)
	{
		cin>>b;
		c+=b;
	}
	cout<<fixed<<setprecision(4)<<c/a<<endl;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main(){
	double a,b,c;
	cin>>a;
	for(int i=1;i<=a;i++)
	{
		cin>>b;
		c+=b;
	}
	cout<<fixed<<setprecision(4)<<c/a<<endl;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main(){
	double a,b,c;
	cin>>a;
	for(int i=1;i<=a;i++)
	{
		cin>>b;
		c+=b;
	}
	cout<<fixed<<setprecision(4)<<c/a<<endl;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main(){
	double a,b,c;
	cin>>a;
	for(int i=1;i<=a;i++)
	{
		cin>>b;
		c+=b;
	}
	cout<<fixed<<setprecision(4)<<c/a<<endl;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main(){
	double a,b,c;
	cin>>a;
	for(int i=1;i<=a;i++)
	{
		cin>>b;
		c+=b;
	}
	cout<<fixed<<setprecision(4)<<c/a<<endl;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main(){
	double a,b,c;
	cin>>a;
	for(int i=1;i<=a;i++)
	{
		cin>>b;
		c+=b;
	}
	cout<<fixed<<setprecision(4)<<c/a<<endl;
}

#include <iostream> #include<cmath> #include<string.h> #include<iomanip> using namespace std; double n,b,c; int main(){ cin>>n; for (int i=1;i<=n;i++) { cin>>b; c+=b;

}
cout << fixed << setprecision(4) << c/n<< endl;
return 0;

}

#include<iostream> #include<iomanip> using namespace std; int main() { int n; cin>>n; double num,sum,avrage; for (int i=1;i<=n;i++) { cin>>num; sum+=num; } avrage=sum/n; printf("%.4lf",avrage ); } 看到这里了 点个赞再走吧再见

#include<iostream>
#include<stdio.h>
using namespace std;
int main()
{
    int n;  
    cin >> n;
    double num,sum,avrage;
    for (int i = 1; i <= n; i++)
    {
        cin >> num;
        sum += num;
    }
    avrage = sum/n;
    printf("%.4lf",avrage );
}

#include<iostream> #include<iomanip> using namespace std; int main() { int n; cin>>n; double num,sum,avrage; for (int i=1;i<=n;i++) { cin>>num; sum+=num; } avrage=sum/n; printf("%.4lf",avrage ); }