#include<stdio.h>
int ksmall(int *arr,int n ,int k){
    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;
            }
        }
}
return *(arr+(k-1));
}

int main(){
    int n;
    if(scanf("%d",&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<0 || k>n){
        printf("Invalid Input");
        return 0;
    }
    printf("%d",ksmall(arr, n, k));
    return 0;
}