BOJ16435.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.StringTokenizer;

public class BOJ16435 {
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine());

        int N = Integer.parseInt(st.nextToken());
        int L = Integer.parseInt(st.nextToken());

        int[] arr = new int[N];
        st = new StringTokenizer(br.readLine());
        for(int i = 0; i < N; i++){
            arr[i] = Integer.parseInt(st.nextToken());
        }

        Arrays.sort(arr);

        for(int i = 0; i < N; i++){
            if(L >= arr[i]){
                L++;
            }
        }

        System.out.print(L);
    }
}