a.cpp

#include<bits/stdc++.h>
using namespace std;
int main(int argc, char const *argv[])
{
    int n,x,c = 0,k;
    cin>>n>>k;
    std::vector<int> v;
    std::map<int, int> mp;
    for(int i = 1; i <= n; i++){
        cin>>x;
        if(!mp.count(x))mp[x] = i,v.push_back(i),c++;
    }
    if(c<k)cout<<"NO"<<endl;
    else{
        v.resize(k);
        printf("YES\n");
        for(auto a:v)cout<<a<<" ";
    }
    return 0;
}