#include <bits/stdc++.h> 

using namespace std;

int dp[2][100001];

int main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);

    int t;

    t = 1;

    while (t--)
    {
        int n, a, b;
        vector <pair<int, int>> v;

        cin >> n;

        for (int i = 0; i < n; i++)
        {
            cin >> a >> b;
            v.push_back(make_pair(a, b));
        }

        dp[1][0] = 0;
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j <= 100000; j++)
            {
                dp[0][j] = dp[1][j];
                dp[1][j] = 1e9;
            }
            for (int j = 0; j <= 100000; j++)
            {
                if (j + v[i].first <= 100000)
                {
                    dp[1][j + v[i].first] = min(dp[1][j + v[i].first], dp[0][j]);
                }
                dp[1][j] = min(dp[1][j], dp[0][j] + v[i].second);
            }
        }

        int res = 1e9;
        for (int i = 0; i <= 100000; i++)
        {
            res = min(res, max(i, dp[1][i]));
        }

        cout << res << '\n';

    }

    return 0;
}