在这里

#include <bits/stdc++.h>
using namespace std;

int main() {
	int a = 0, c = 0;
	cin >> a >> c;
	int b[a] = {0};

	for (int i = 0; i < a; i++) {

		cin >> b[i];
	}

	sort(b, b + a);

	for (int i = 0; i < a - 1; i++) {

		if (b[i] == b[i + 1]) {
			c += 1;
		}
	}

	if (c > a) {
		cout << "NO RESULT";
		return 0;
	}

	cout << b[c - 1];
}