// editor1
#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;j < N; 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;
    }