# include<bits/stdc++.h>
using namespace std;
const int N = 30005;
int a[N];
int main(){
	int n, k, x;
	cin >> n;
	for(int i = 1; i <= n; i++){
		cin >> x;
		a[x]++;
	}
	int s = 0;
	for(int i = 1; i <= N; i++){
		if(a[i] > 0) s++;
		if(s == k){
			cout << i;
			return 0;
		}
	}
	cout << "NO RESULT";
	return 0;
}