#include<stdio.h>
int main(){
    int N, K;
    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]);
    }
    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;
}