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