#include<bits/stdc++.h> using namespace std; int n,k,a[10010],b[30010],maxn,f; int main(){ cin>>n>>k; f=k; for(int i=1;i<=n;i++){ cin>>a[i]; b[a[i]]=1; maxn=max(maxn,a[i]); } for(int i=1;i<=n;i++){ if(b[i]) k--; if(k==0){ cout<<f; return 0; } } cout<<"NO RESULT"; return 0; }