#include<stdio.h>
int main() {
    int size,ind;
    scanf("%d",&size);
    if(size<0) {
        printf("Invalid Input");
        return 0;
    }
    int arr[size];
    for(ind=0;ind<size;scanf("%d",&arr[ind++]));
    scanf("%d",&k);
    if(k<1 || k>size) {
        printf("Invalid Input");
        return 0;
    }
    for(itr=1;itr<size;itr++) {
        for(ind=0;ind<size-itr;ind++) {
            if(arr[ind]>arr[ind+1]) {
                temp=arr[ind];
                arr[ind]=arr[ind+1];
                arr[ind+1]=temp;
            }
        }
    }
    printf("%d",arr[k-1]);
    return 0;
}