#include<bits/stdc++.h>
#include<cmath>
#include<iomanip>

using namespace std;

int main(){
double a,b,c;
double x1,x2;
cin>>a>>b>>c;
x1=( -b-sqrt(b*b-4*a*c) )/(2*a);
x2=( -b+sqrt(b*b-4*a*c) )/(2*a);
if(b*b-4*a*c>0){
cout<<fixed<<setprecision(5)<<"x1="<<x1<<";"<<"x2="<<x2;
}
else if(b*b-4*a*c==0){
cout<<fixed<<setprecision(5)<<"x1=x2="<<x1;
}
else{
cout<<"No answer!";
}
return 0;
}

#include<bits/stdc++.h>
using namespace std;
int main()
{ 
    int n,a,sum=0;
    double t;
    cin>>n;
    for(int i=1;i<=n;i=i+1)
    {
    	cin>>a;
    	sum=sum+a;
	}
	t=sum*1.0/n;
	cout<<fixed<<setprecision(2)<<t;
    return 0;
}