using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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 a = consoleReader.Split.Int;

            var pq = new PriorityQueue<int, int>(Comparer<int>.Create((y, x) => x - y));
            foreach (var item in a)
                pq.Add(item, 0);

            for (int i = 0; i < M; i++)
            {
                var target = pq.Dequeue().Key;
                pq.Add(target / 2, 0);
            }

            return pq.Sum(pair => (long)pair.Key);
        }
        class PriorityQueue<TKey, TValue> : IEnumerable<KeyValuePair<TKey, TValue>>
        {
            SortedDictionary<TKey, Queue<TValue>> dic;

            public int Count { get; private set; } = 0;

            public void Add(TKey key, TValue value)
            {
                if (!dic.ContainsKey(key)) dic[key] = new Queue<TValue>();

                dic[key].Enqueue(value);
                Count++;
            }

            public KeyValuePair<TKey, TValue> Dequeue()
            {
                var queue = dic.First();
                if (queue.Value.Count <= 1) dic.Remove(queue.Key);
                Count--;
                return new KeyValuePair<TKey, TValue>(queue.Key, queue.Value.Dequeue());
            }

            public IEnumerator<KeyValuePair<TKey, TValue>> GetEnumerator()
            {
                foreach (var pair in dic)
                    foreach (var queue in pair.Value)
                        yield return new KeyValuePair<TKey, TValue>(pair.Key, queue);
            }
            System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() => this.GetEnumerator();

            public PriorityQueue() { dic = new SortedDictionary<TKey, Queue<TValue>>(); }
            public PriorityQueue(IComparer<TKey> comparer) { dic = new SortedDictionary<TKey, Queue<TValue>>(comparer); }
        }

        #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);
        #endregion
    }
    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);
    }
}

Measured memory_bytes: 40424