using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static string InputPattern = "Input5";

    static List<string> GetInputList()
    {
        var WillReturn = new List<string>();

        if (InputPattern == "Input1") {
            WillReturn.Add("5");
            WillReturn.Add("3");
            WillReturn.Add("1 2 3");
            WillReturn.Add("3 2 1");
        }
        else if (InputPattern == "Input2") {
            WillReturn.Add("9");
            WillReturn.Add("2");
            WillReturn.Add("8 2");
            WillReturn.Add("9 7");
        }
        else if (InputPattern == "Input3") {
            WillReturn.Add("9");
            WillReturn.Add("2");
            WillReturn.Add("8 2");
            WillReturn.Add("9 5");
        }
        else if (InputPattern == "Input4") {
            WillReturn.Add("20");
            WillReturn.Add("5");
            WillReturn.Add("10 7 9 5 7");
            WillReturn.Add("5 8 2 8 1");
        }
        else {
            string wkStr;
            while ((wkStr = Console.ReadLine()) != null) WillReturn.Add(wkStr);
        }
        return WillReturn;
    }

    struct JyoutaiDef
    {
        internal int CurrP;
        internal int CSum;
        internal int VSum;
        internal int[] CurrVArr;
        internal string Path;
    }

    static void Main()
    {
        List<string> InputList = GetInputList();

        int T = int.Parse(InputList[0]);
        int[] CArr = InputList[2].Split(' ').Select(X => int.Parse(X)).ToArray();
        int[] VArr = InputList[3].Split(' ').Select(X => int.Parse(X)).ToArray();
        int UB = CArr.GetUpperBound(0);

        var stk = new Stack<JyoutaiDef>();
        JyoutaiDef WillPush;
        WillPush.CurrP = 0;
        WillPush.CSum = 0;
        WillPush.VSum = 0;
        WillPush.CurrVArr = VArr;
        WillPush.Path = "";
        stk.Push(WillPush);

        int AnswerVSum = 0;
        string AnswerPath = "";

        while (stk.Count > 0) {
            JyoutaiDef Popped = stk.Pop();
            //Console.WriteLine("満足度合計={0}", Popped.VSum);
            //Console.WriteLine(Popped.Path);

            //解の更新
            if (AnswerVSum < Popped.VSum) {
                AnswerVSum = Popped.VSum;
                AnswerPath = Popped.Path;
            }

            for (int I = Popped.CurrP; I <= UB; I++) {
                //対象アトラクションの満足度が0ならContinue;
                int CurrV = Popped.CurrVArr[I];
                if (CurrV == 0) continue;

                //Push処理
                WillPush.CurrP = I;
                WillPush.CSum = Popped.CSum + CArr[I];
                if (WillPush.CSum > T) continue;
                WillPush.VSum = Popped.VSum + CurrV;
                WillPush.CurrVArr = (int[])Popped.CurrVArr.Clone();
                WillPush.CurrVArr[I] /= 2; //満足度の更新
                WillPush.Path = Popped.Path + Environment.NewLine +
                    string.Format("アトラクション{0}(満足度{1})", I, CurrV);

                //下限値枝切り
                int RestSum = WillPush.VSum;
                for (int J = WillPush.CurrP; J <= UB; J++) {
                    int wkV = WillPush.CurrVArr[J];
                    while (true) {
                        RestSum += wkV;
                        if ((wkV /= 2) == 0) break;
                    }
                }
                if (RestSum < AnswerVSum) continue;

                stk.Push(WillPush);
            }
        }
        //Console.WriteLine("最大満足度={0}", AnswerVSum);
        //Console.WriteLine(AnswerPath);
        Console.WriteLine(AnswerVSum);
    }
}