using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace yukicoderTest
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine();
            string input2 = Console.ReadLine();
            string[] NM = input.Split(' ');
            string[] C = input2.Split(' ');
            int box = int.Parse(NM[0]);
            int takecandy = int.Parse(NM[1]);
            int[] candyinbox = new int[C.Length];
            int zeroboxcnt = 0;
            int candycnt = 0;
            for(int i=0;i<C.Length;i++)
            {
                candyinbox[i] = int.Parse(C[i]);
            }
            Array.Sort(candyinbox);
            for(int i=0;i<C.Length;i++)
            {
                if(candycnt==takecandy)
                {
                    break;
                }
                while(candycnt!=takecandy)
                {
                    candyinbox[i]--;
                    candycnt++;
                    if(candyinbox[i]==0)
                    {
                        zeroboxcnt++;
                        break;
                    }
                }
            }
            Console.WriteLine(zeroboxcnt);
        }

    }
}