#include<cstdio>
#include<algorithm>
#include<vector>
#define M 2000000000
using namespace std;
FILE *f=fopen("sdo.in","r");
FILE *g=fopen("sdo.out","w");
int n,ord,i,x;
vector<int>v;
int main()
{
    fscanf(f,"%d%d",&n,&ord);
    for(i=1;i<=n;i++)
       {
           fscanf(f,"%d",&x);
           v.push_back(x);
       }
       int nr=0;
    while(nr<ord-1)
     {
         nr++;
         v[min_element(v.begin(),v.end())-v.begin()]=M;

     }


    fprintf(g,"%d",*min_element(v.begin(),v.end()));
    return 0;
}