using System;
using System.IO;
using System.Linq;
using System.Collections.Generic;
using System.Text;

public class Program
{

	public void Proc()
	{
        int itemCount = int.Parse(Reader.ReadLine());
        for (int i = 0; i < itemCount; i++) {
            this.ShinamonoList.Add(new Shinamono(Reader.ReadLine()));
        }
        long ans = GetAns(0, 0, 0);
        Console.WriteLine(ans);
    }

    private Dictionary<int, Dictionary<long, Dictionary<long, long>>> dic = new Dictionary<int, Dictionary<long, Dictionary<long, long>>>();

    private long GetAns(int idx, long subtotalA, long subtotalB) {
        if(idx>=this.ShinamonoList.Count) {
            return Math.Abs(subtotalA - subtotalB);
        }

        if(!dic.ContainsKey(idx)) {
            dic.Add(idx, new Dictionary<long, Dictionary<long, long>>());
        }
        if(!dic[idx].ContainsKey(subtotalA)) {
            dic[idx].Add(subtotalA, new Dictionary<long, long>());
        }
        if(dic[idx][subtotalA].ContainsKey(subtotalB)) {
            return dic[idx][subtotalA][subtotalB];
        }

        long ans = long.MaxValue;
        ans = Math.Min(ans, GetAns(idx + 1, subtotalA + this.ShinamonoList[idx].ValueA, subtotalB));
        ans = Math.Min(ans, GetAns(idx + 1, subtotalA, subtotalB + ShinamonoList[idx].ValueB));
        dic[idx][subtotalA][subtotalB] = ans;
        return ans;
    }

    private List<Shinamono> ShinamonoList = new List<Shinamono>();

    private class Shinamono {
        public long ValueA;
        public long ValueB;
        public Shinamono(string init) {
            long[] tmp = init.Split(' ').Select(a => long.Parse(a)).ToArray();
            this.ValueA = tmp[0];
            this.ValueB = tmp[1];
        }
    }


	public class Reader
	{
		private static StringReader sr;
		public static bool IsDebug = false;
		public static string ReadLine()
		{
			if (IsDebug)
			{
				if (sr == null)
				{
					sr = new StringReader(InputText.Trim());
				}
				return sr.ReadLine();
			}
			else
			{
				return Console.ReadLine();
			}
		}
		private static string InputText = @"
 
 
1
10 15

 
";
	}

	public static void Main(string[] args)
	{
#if DEBUG
		Reader.IsDebug = true;
#endif
		Program prg = new Program();
		prg.Proc();
	}
}