用桶？用set？我都不，我就要硬写

#include <bits/stdc++.h>
using namespace std;
const int N = 1005;
int cmp(int a,int b){
    return a<b;
}
int n,m,a[N];
int main(){
    cin >> n >> m;
    for(int i=0;i<n;i++){
        cin >> a[i];
    }
    sort(a,a+n,cmp);
    int cnt=0;
    for(int i=0;i<n;i++){
        if(a[i] != a[i+1]) cnt ++;
        if(cnt == m){
            cout << a[i];
            return 0;
        }
    }
    cout << "NO RESULT";
    return 0;
}