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

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        var a = NArr(n);
        var INF = int.MaxValue / 2;
        var init = Enumerable.Repeat(INF, 100_001).ToArray();
        var dp = (int[])init.Clone();
        dp[0] = 0;
        for (var i = 0; i < n; ++i)
        {
            var ndp = (int[])init.Clone();
            for (var j = 0; j < dp.Length; ++j)
            {
                if (dp[j] == INF) continue;
                ndp[j] = Math.Min(ndp[j], dp[j] + a[i][1]);
                ndp[j + a[i][0]] = Math.Min(ndp[j + a[i][0]], dp[j]);
            }
            dp = ndp;
        }
        var ans = INF;
        for (var i = 0; i < dp.Length; ++i) ans = Math.Min(ans, Math.Max(i, dp[i]));
        WriteLine(ans);
    }
}