哪位大佬能帮助一下，十分感谢

#include <iostream>
#include <algorithm>
using namespace std;

int a[10001];
int ans[10001];
int main()
{
	int n, k;
	cin >> n >> k;
	for(int i = 1; i <= n; i++)
	{
		cin >> a[i];
	}
	sort(a + 1, a + n + 1);
	int sum = 0;
	for(int i = 1; i <= n; i++)
	{
		if(a[i] == a[i + 1])
		{
			continue;
		}
		sum++;
		ans[sum] = a[i];
		
	}
	if(ans[k] == 0)
	{
		cout << "NO RESULT";
	}
	cout << ans[k] << endl;
	return 0;
}