#include<stdio.h>
int main(){
    int size,k,ind,temp;
    scanf("%d", &size);
    if(size<0)
    {
        printf("Invalid Input");
        return 0;
    }
    int arr[size];
    for(ind=0;ind<size;scanf("%d",&arr[ind++]));
    {
        scanf("%d",&k);
        if(k<1 || k>size){
            printf("Invalid Input");
            return 0;
        }
        
    }
    int itr;
    for(itr=1;itr<size;itr++)
    {
        for(ind=0;ind<size-itr;itr++){
            if(arr[ind] > arr[ind+1]){
                temp=arr[ind];
                arr[ind=arr[ind+1];
                arr[ind+1]=temp;
            }
        }
    }
    printf("%d",arr[k+1]);
    
}