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

// https://yukicoder.me/problems/no/1594
class Program
{
    static string InputPattern = "InputX";

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

        if (InputPattern == "Input1") {
            WillReturn.Add("5");
            WillReturn.Add("1 2 3 4 5");
        }
        else if (InputPattern == "Input2") {
            WillReturn.Add("7");
            WillReturn.Add("3 1 4 1 5 9 2");
        }
        else if (InputPattern == "Input3") {
            WillReturn.Add("9");
            WillReturn.Add("729 756 767 778 792 804 816 831 855");
        }
        else {
            string wkStr;
            while ((wkStr = Console.ReadLine()) != null) WillReturn.Add(wkStr);
        }
        return WillReturn;
    }

    static void Main()
    {
        List<string> InputList = GetInputList();
        long[] EArr = InputList[1].Split(' ').Select(pX => long.Parse(pX)).ToArray();
        long UB = EArr.GetUpperBound(0);

        var Stk = new Stack<JyoutaiDef>();
        JyoutaiDef WillPush;
        WillPush.ValList = new List<long>();
        WillPush.CurrInd = 0;
        Stk.Push(WillPush);

        while (Stk.Count > 0) {
            JyoutaiDef Popped = Stk.Pop();
            int CurrInd = Popped.CurrInd;

            if (CurrInd > UB) {
                if (Popped.ValList.Count == 3) {
                    if (Popped.ValList.Distinct().Count() == 1) {
                        Console.WriteLine("Yes");
                        return;
                    }
                }
                continue;
            }

            // 枝切り
            if (Popped.ValList.Count >= 2) {
                if (Popped.ValList[0] < Popped.ValList[1]) {
                    continue;
                }
            }

            // Listの要素に足し算する場合
            for (int I = 0; I <= Popped.ValList.Count - 1; I++) {
                WillPush.ValList = new List<long>(Popped.ValList);
                WillPush.ValList[I] = Popped.ValList[I] + EArr[CurrInd];
                WillPush.CurrInd = CurrInd + 1;
                Stk.Push(WillPush);
            }

            // ListにAddする場合
            WillPush.ValList = new List<long>(Popped.ValList);
            WillPush.ValList.Add(EArr[CurrInd]);
            WillPush.CurrInd = CurrInd + 1;
            Stk.Push(WillPush);
        }
        Console.WriteLine("No");
    }

    struct JyoutaiDef
    {
        internal List<long> ValList;
        internal int CurrInd;
    }
}