#include <iostream>
using namespace std;
 
int main(){
    int a[1010],i,n,x,p,t,j;
    cin>>n;
    for(i = 0;i < n;i++){
        cin>>a[i];
    }
    cin>>x;
     
    //排序 
    for(i = 1;i <= n - 1;i++){
        for(j = 0;j <= n - i - 1;j++){
            if(a[j] < a[j + 1]){
                t = a[j];
                a[j] = a[j + 1];
                a[j + 1] = t;
            }
        }
    }
     
    cout<<a[x - 1]<<endl;
}
/**************************************************************
	Problem: 1497
	User: wangyiyang
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/