using System;

using System.Linq;

public class Program

{

    public static void Main(string[] args)

    {

        Console.WriteLine("O menor número positivo é: " + solution(new int[]{1, 3, 6, 4, 1, 2}));

    }

    public static int solution(int[] A)

    {

        Array.Sort(A);

        int smallest = A[0];

        while (A.Contains(smallest+1)|| (smallest+1)<1)

        {

            smallest++;

        }

        return smallest +1;

    }

}