AC

#include<iostream>
#include<set>
using namespace std;
int main() {
	set<int> se;
	int n, m;
	cin >> n >> m;
	for (int i = 0; i < n; i++) {
		int c;
		cin >> c;
		se.insert(c);
	}
	int idx = 1;
	set<int>::iterator it;
	for (it = se.begin(); it != se.end(); it++, idx++) {
		if (idx == m) {
			cout << *it;
			return 0;
		}
	}
	cout << "NO RESULT";
	return 0;
}