『洛谷 P1026』第K小数

水一波题解。。
我不会告诉你我没看见输出NO RESULT所以WA了两次。。。

#include <iostream>
#include <cstdio>
#include <algorithm>
#define MAXN 10000 + 1
using namespace std;
int N, k;
int a[MAXN];
int main(int argc, char **argv)
{
	ios::sync_with_stdio(false);
	cin >> N >> k;
	for (register int i = 1; i <= N; ++i)
		cin >> a[i];
	sort(a + 1, a + N + 1);
	if (k == 1)
	{
		cout << a[1] << endl;
		return 0;
	}
	int kth = 1;
	for (register int i = 2; i <= N; ++i)
	{
		if (a[i] != a[i - 1]) kth++;
		if (kth == k)
		{
			cout << a[i] << endl;
			return 0;
		}
	}
	cout << "NO RESULT" << endl;
	return 0;
}