class Program
{
    static void Main(string[] args)
    {
        string inputWidth = Console.ReadLine()!;
        string inputCount = Console.ReadLine()!;
        string[] inputBlock = Console.ReadLine()!.Split(' ');

        int width = int.Parse(inputWidth);
        int count = int.Parse(inputCount);
        int[] blockArray = new int[inputBlock.Length];

        for (int i = 0; i < inputBlock.Length; i++)
        {
            blockArray[i] = int.Parse(inputBlock[i]);
        }

        Array.Sort(blockArray);

        int output = 0;
        int sum = 0;
        for (int i = 0; i < blockArray.Length; i++)
        {
            sum = sum + blockArray[i];
            if (sum <= width)
            {
                output++;
            }
            
            if (sum >= width || i + 1 == blockArray.Length)
            {
                Console.WriteLine(output);
                break;
            }
        }
    }
}