using static System.Math;
using System.Linq;
using System.Collections.Generic;
using System;

public class P
{
    public int ended { get; set; }
    public int pre { get; set; }
}

public class Hello
{
    public static int n;
    static void Main()
    {
        n = int.Parse(Console.ReadLine().Trim());
        var input = new int[n, 2];
        for (int i = 0; i < n; i++)
        {
            string[] line = Console.ReadLine().Trim().Split(' ');
            input[i, 0] = int.Parse(line[0]);
            input[i, 1] = int.Parse(line[1]);
        }
        getAns(input);
    }
    static int[,] makeArray(int[,] input)
    {
        var res = new int[n, n];
        for (int i = 0; i < n; i++)
            for (int j = 0; j < n; j++)
                if (i != j) res[i, j] = input[i, 1] - input[i, 0] + input[j, 0];
        return res;
    }
    static void getAns(int[,] input)
    {
        var aa = makeArray(input);
        var imax = 1 << n;
        var dp = new int[imax, n];
        for (int i = 0; i < imax; i++)
            for (int j = 0; j < n; j++) dp[i, j] = int.MaxValue;
        var q = new Queue<P>();
        for (int i = 0; i < n; i++)
        {
            var t = 1 << i;
            dp[t, i] = 0;
            q.Enqueue(new P { ended = t, pre = i });
        }
        while (q.Count() > 0)
        {
            var w = q.Dequeue();
            for (int i = 0; i < n; i++)
            {
                if (((w.ended >> i) & 1) == 0)
                {

                    var ndp = Max(dp[w.ended, w.pre], aa[w.pre, i]);
                    var nended = (w.ended | (1 << i));
                    if (ndp < dp[nended, i])
                    {
                        dp[nended, i] = ndp;
                        q.Enqueue(new P { ended = nended, pre = i });
                    }
                }
            }
        }
        var ans = int.MaxValue;
        for (int i = 0; i < n; i++)
            ans = Min(ans, dp[imax - 1, i]);
        Console.WriteLine(ans);
    }
}