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

class Program
{
    static void Main()
    {
        new Magatro().Solve();
    }
}

class Magatro
{
    private int N;
    private int[] A, B;
    private void Scan()
    {
        N = int.Parse(Console.ReadLine());
        A = new int[N];
        B = new int[N];
        for (int i = 0; i < N; i++)
        {
            var line = Console.ReadLine().Split(' ');
            A[i] = int.Parse(line[0]);
            B[i] = int.Parse(line[1]);
        }
    }

    private long DFS(long aa,long bb,int n)
    {
        if(n == N)
        {
            return Math.Abs(aa - bb);
        }
        long a = DFS(aa + A[n], bb, n + 1);
        long b = DFS(aa, bb + B[n], n + 1);
        return Math.Min(a , b);
    }

    public void Solve()
    {
        Scan();
        Console.WriteLine(DFS(0, 0, 0));
    }
}