#include <stdio.h>


void gemFinder(int *arr, int *k, int n){
    for(int i=0; i<n-1; i++){
        for(int j=0; j<n-i-1; j++){
            if(*arr[j]>*arr[j+1]){
                int temp = arr[j];
                arr[j] = arr[j+1];
                arr[j+1] = temp;
            }
        }
    }
    
    
}

int main(){
    int n,i,k,element;
    scanf("%d", &n);
    int arr[n];
    for(i=0; i<n; i++){
        arr[i] = scanf("%d", &element);
    }
    scanf("%d", &k);
    
    gemFinder(&arr,&k,n);
    printf("%d", arr[k]);
    return 0;
}