using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using static AtCoderProject.Utility;
using IEnumerable = System.Collections.IEnumerable;
using IEnumerator = System.Collections.IEnumerator;
using BitArray = System.Collections.BitArray;
using BigInteger = System.Numerics.BigInteger;
using TextReader = System.IO.TextReader;

namespace AtCoderProject
{
    public class Program
    {
        public object Calc()
        {
            var N = consoleReader.Int;
            var M = consoleReader.Int;
            var sorted = new SortedCollection<long>(consoleReader.Split.Long, ReverseComparer<long>());
            for (int i = 0; i < M; i++)
            {
                var target = sorted.First();
                sorted.Remove(target);
                sorted.Add(target / 2);
            }

            return sorted.Sum();
        }
        class SortedCollection<T> : ICollection<T>
        {
            SortedDictionary<T, int> dic;
            public SortedCollection() : this(Comparer<T>.Default) { }
            public SortedCollection(IComparer<T> comparer) { dic = new SortedDictionary<T, int>(comparer); }
            public SortedCollection(IEnumerable<T> original) : this(original, Comparer<T>.Default) { }
            public SortedCollection(IEnumerable<T> original, IComparer<T> comparer) : this(comparer)
            {
                foreach (var item in original)
                    this.Add(item);
            }

            public bool IsReadOnly => false;
            public int Count { get; private set; } = 0;
            public void Add(T item)
            {
                if (dic.ContainsKey(item)) ++dic[item];
                else dic[item] = 1;
                Count++;
            }
            public void Clear() => dic.Clear();
            public bool Contains(T item) => dic.ContainsKey(item);
            public void CopyTo(T[] array, int arrayIndex) { throw new NotImplementedException(); }

            public bool Remove(T item)
            {
                int count;
                if (dic.TryGetValue(item, out count))
                {
                    if (count > 1) --dic[item];
                    else dic.Remove(item);
                    return true;
                }
                else
                    return false;
            }

            IEnumerator IEnumerable.GetEnumerator() => this.GetEnumerator();
            public IEnumerator<T> GetEnumerator()
            {
                foreach (var pair in dic)
                    foreach (var item in Enumerable.Repeat(pair.Key, pair.Value))
                        yield return item;
            }
        }

        #region いつもの
        private readonly ConsoleReader consoleReader;
        public Program(ConsoleReader consoleReader) { this.consoleReader = consoleReader; }
        static void Main() => Console.WriteLine(new Program(new ConsoleReader(Console.In)).Calc()); static string AllLines<T>(IEnumerable<T> source) => string.Join("\n", source);
    }

    public class ConsoleReader
    {
        private string[] ReadLineSplit() => textReader.ReadLine().Split(Array.Empty<char>(), StringSplitOptions.RemoveEmptyEntries);
        private string[] line = Array.Empty<string>();
        private int linePosition;
        private TextReader textReader;
        public ConsoleReader(TextReader tr) { textReader = tr; }
        public int Int => int.Parse(String);
        public long Long => long.Parse(String);
        public double Double => double.Parse(String);
        public string String
        {
            get
            {
                if (linePosition >= line.Length)
                {
                    linePosition = 0;
                    line = ReadLineSplit();
                }
                return line[linePosition++];
            }
        }
        public class SplitLine
        {
            public SplitLine(ConsoleReader cr) { String = cr.ReadLineSplit(); cr.line = Array.Empty<string>(); }
            public int[] Int => String.Select(x => int.Parse(x)).ToArray();
            public int[] Int0 => String.Select(x => int.Parse(x) - 1).ToArray();
            public long[] Long => String.Select(x => long.Parse(x)).ToArray();
            public double[] Double => String.Select(x => double.Parse(x)).ToArray();
            public string[] String { get; }
        }
        public SplitLine Split => new SplitLine(this);
        public class RepeatReader : IEnumerable<ConsoleReader>
        {
            ConsoleReader cr; int count;
            public RepeatReader(ConsoleReader cr, int count) { this.cr = cr; this.count = count; }
            public IEnumerator<ConsoleReader> GetEnumerator() => Enumerable.Repeat(cr, count).GetEnumerator();
            System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() => GetEnumerator();

            public IEnumerable<string> String => this.Select(cr => cr.String);
            public IEnumerable<int> Int => this.Select(cr => cr.Int);
            public IEnumerable<int> Int0 => this.Select(cr => cr.Int - 1);
            public IEnumerable<long> Long => this.Select(cr => cr.Long);
            public IEnumerable<double> Double => this.Select(cr => cr.Double);
        }
        public RepeatReader Repeat(int count) => new RepeatReader(this, count);
    }
    public static class Utility
    {
        public static IComparer<T> ReverseComparer<T>() where T : IComparable<T>
            => Comparer<T>.Create((x, y) => y.CompareTo(x));
    }
    #endregion
}

Measured memory_bytes: 38216