import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.Scanner;
import java.util.stream.Stream;

import static java.lang.System.in;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        String[] inputs = reader.readLine().split(" ");
        int N = Integer.parseInt(inputs[0]);
        int M = Integer.parseInt(inputs[1]);
        inputs = reader.readLine().split(" ");
        int[] boxes = Stream.of(inputs).mapToInt(Integer::parseInt).toArray();
        Arrays.sort(boxes);
        int index = 0;
        while (M != 0) {
            if (boxes[index] == 0) {
                index += 1;
            } else {
                boxes[index] -= 1;
                M -= 1;
            }
        }
        if (boxes[index] == 0) {
            System.out.println(index + 1);
        } else {
            System.out.println(index);
        }

    }
}