#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: admin
	Language: C++
	Result: Accepted
	Time:15 ms
	Memory:2072 kb
****************************************************************/