#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,i,j;
    float z;
    cin>>n;
    int a[n];
    for(i=0;i<n;i++){
        cin>>a[i];
    }
    for(i=1;i<=n-1;i++){
        for(j=0;j<n-i;j++){
            if(a[j]>a[j+1]){
                swap(a[j],a[j+1]);
            }
        }
    }
    if(n%2==0){
        z=(a[n/2]+a[n/2-1])/2.0;
    }else{
        z=a[n/2];
    }
/**************************************************************
	Problem: 1233
	User: lijinkai
	Language: C++
	Result: Compile Error
****************************************************************/