#include <stdio.h>
#include <stdlib.h>

int compare(const void *a, const void *b) {
    return ((int a)- (int b));
}

int main() {
    int n, k, i;

    if (scanf("%d", &n) != 1 || n < 1 || n > 10) {
        printf("Invalid Input\n");
        return 0;
    }

    int arr[10]; // since n ≤ 10
    for (i = 0; i < n; i++) {
        if (scanf("%d", arr + i) != 1 || *(arr + i) < -100000 || *(arr + i) > 100000) {
            printf("Invalid Input\n");
            return 0;
        }
    }

    if (scanf("%d", &k) != 1 || k < 1 || k > n) {
        printf("Invalid Input\n");
        return 0;
    }

    qsort(arr, n, sizeof(int), compare);

    printf("%d\n", *(arr + k - 1));
    return 0;
}