[백준] P2437

import java.util.Arrays;
import java.util.Scanner;

public class P2437 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt(), arr[] = new int[n], answer = 1;
		for (int i = 0; i < n; i++) arr[i] = sc.nextInt();

		Arrays.sort(arr);

		for (int i = 0; i < arr.length; i++) {
			if (answer < arr[i])
				break;
			answer += arr[i];
		}

		System.out.println(answer);
		sc.close();
	}
}