#include <bits/stdc++.h>
using namespace std;
ifstream fin("sdo.in");
ofstream fout("sdo.out");
int n;
bitset<1000000001> M;

int main()
{
    int i, k, rez, x;
    fin >> n >> k;
    for(i = 1; i <= n; i++)
    {
        fin >> x;
        M[x] = 1;
    }
    for(i = 1; i <= 1000000000; i++)
    {
        if(M[i] == 1) k--;
        if(k == 0)
        {
            rez = i;
            break;
        }
    }
    fout << rez;
    return 0;
}