#include <iostream>
#include <cstring>
#include <cmath>
#include <algorithm>
#include <iomanip>
using namespace std;
int A[100000000];
int main()
{
	int n,x,m,i;
	cin >> n >> m;
	for(i = 1;i <= n;i++)
	{
		cin >> x;
		A[x]++;
	}
	x = -1;
	for(i = 1;i <= 1000000000;i++)
	{
		if(A[i] != 0)
		{
			x++;
			if(x == m)
			{
				cout << i;
				break;
			}
		}
	}
    return 0;
}