#include <bits/stdc++.h>
using namespace std;
int n,k,arr[5000001];
int read(){
    int a = 0;
    while(1){
        int c = getchar();
        if(c>'9'||c<'0'){
            a/=10;
            break;
        }
        c-=48;
        a+=c;
        a*=10;
    }
    return a;
}
int main(){
	n = read();
	k = read();
	for(int i=1;i<=n;i++){
		arr[i] = read();
	}
	sort(arr,arr+n);
	cout<<arr[k+1];
	return 0;
}

WA后三个（没有超时）