#include<bits/stdc++.h>
using namespace std;
const int N = 1e5 + 6;
int n, k;
int a[N];
int main() {
	scanf("%d%d", &n, &k);
	for (int i = 1; i <= n; ++i) {
		int x;
		scanf("%d", &x);
		a[x]++;
	}
	int tmp = 0;
	for (int i = 1; i <= 30000; ++i) {
	    if (a[i] > 0)
		    ++tmp;
		if (tmp == 3) {
		    printf("%d", i); 
		    return 0;
		}
	}
	printf("NO RESULT");
	return 0;
}