#include <iostream>
#include <fstream>
#include <algorithm>
using namespace std;
int v[3000000];
unsigned int u[420000000];
int main()
{
    ifstream fin("sdo.in"); ofstream fout("sdo.out");
    int i,n,k,a,b=1;
    fin>>n>>k;
    for(i=1;i<=n;i++)
    {
        fin>>a;
        if(u[a]==NULL) {v[b]=a; u[a]=1; b++;}
    }
    sort(v+1,v+b);
    fout<<v[k];
}