#include <stdio.h>
int main(){
    int size,ind,k,itr,temp;
    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<2 || 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;
}