#include<bits/stdc++.h>
using namespace std;
typedef long long ll;



signed main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << fixed << setprecision(20);
    
    
    ll q,k;
    cin>>q>>k;
    ll ans=-1;
    priority_queue<ll,vector<ll>> que;
    priority_queue<ll,vector<ll>,greater<ll>> gre;
    while(q--){
        ll t;
        cin>>t;
        if(t==1){
            ll v;
            cin>>v;
            if(que.size()==k){
                if(ans < v) gre.push(v);
                else {
                    que.push(v);
                    gre.push(que.top());
                    que.pop();
                    ans = que.top();
                }
            }
            else{
                que.push(v);
                if(que.size()==k){
                    ans = que.top();
                }
            }
        }
        if(t==2){
            cout << ans << "\n";
            if(que.size()==k){
                que.pop();
                ans = -1;
                if(gre.size()){
                    ans = gre.top();
                    que.push(ans);
                    gre.pop();
                }
            }
        }
    }

    
}