import java.util.*;
import java.io.*;

public class Main {
	public static void main (String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String[] first = br.readLine().split(" ", 2);
		int q = Integer.parseInt(first[0]);
		int k = Integer.parseInt(first[1]);
		ArrayList<Long> list = new ArrayList<>();
		list.add(Long.MIN_VALUE);
		list.add(Long.MAX_VALUE);
		StringBuilder sb = new StringBuilder();
		for (int i = 0; i < q; i++) {
		    String[] line = br.readLine().split(" ");
		    int type = Integer.parseInt(line[0]);
		    if (type == 1) {
		        long x = Long.parseLong(line[1]);
		        int left = 0;
		        int right = list.size();
		        while (right - left > 1) {
		            int m = (left + right) / 2;
		            if (list.get(m) > x) {
		                right = m;
		            } else {
		                left = m;
		            }
		        }
		        list.add(right, x);
		    } else {
		        if (list.size() - 2 < k) {
		            sb.append(-1);
		        } else {
		            sb.append(list.get(k));
    		        list.remove(k);
		        }
		        sb.append("\n");
		    }
		}
		System.out.print(sb);
	}
}