#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include "algo/debug.h"
#else
#define debug(...) 42
#endif
typedef long long ll;
typedef unsigned long long ull;
const int N = 1e5 + 10, INF = 1e9;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    int n; cin >> n;
    vector<int> a(n + 1), b(n + 1);
    for (int i = 1; i <= n; i++) {
        cin >> a[i] >> b[i];
    }
    vector<vector<int>> dp(n + 1, vector<int>(5e6 + 1, INF));
    dp[0][0] = 0;
    for (int i = 1; i <= n; i++) {
        for (int j = 0; j <= 5e6; j++) {
            dp[i][j] = min(dp[i][j], dp[i - 1][j] + b[i]);
            if (j >= a[i]) dp[i][j] = min(dp[i][j], dp[i - 1][j - a[i]]);
        }
    }
    int mi = INF;
    for (int i = 0; i <= 5e6; i++) {
        mi = min(mi, max(dp[n][i], i));
    }
    cout << mi;
    return 0;
}