//=================================
// Created on: 2018/07/07 18:19:37
//=================================
#include <bits/stdc++.h>
#define show(x) cerr << #x << " = " << x << endl
using namespace std;
using ll = long long;
using ld = long double;
constexpr ll MOD = 1000000007LL;
template <typename T>
constexpr T INF = numeric_limits<T>::max() / 10;
mt19937 mt{random_device{}()};
int main()
{
    int N;
    cin >> N;
    vector<int> A(N), B(N);
    for (int i = 0; i < N; i++) { cin >> A[i] >> B[i]; }
    const int MAX = 100000;
    vector<int> dp(MAX + 1, INF<int>);
    dp[0] = 0;
    for (int i = 0; i < N; i++) {
        vector<int> tmp(MAX + 1, INF<int>);
        for (int j = 0; j <= MAX; j++) {
            if (dp[j] == INF<int>) { continue; }
            tmp[j] = min(tmp[j], dp[j] + B[i]);
            tmp[j + A[i]] = min(tmp[j + A[i]], dp[j]);
        }
        dp = tmp;
    }
    int ans = INF<int>;
    for (int i = 0; i <= MAX; i++) { ans = min(ans, max(dp[i], i)); }
    cout << ans << endl;
    return 0;
}