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