题解

#include<bits/stdc++.h>
using namespace std;
int main(){
	int n[100001]={};
	int bucket[30001]={};
	int k,times,t=0;
	cin>>times>>k;
	for (int i=0;i<times;i++){
		cin>>n[i];
		bucket[n[i]]=1;
	}
	for (int i=0;i<30001;i++){
		if (bucket[i]==1){
		t++;
		}
	if (t==k){
		cout<<i;
		return 0;
		}
	}
	cout<<"NO RESULT";
	return 0;
}