#include <bits/stdc++.h>

using namespace std;

using ll = long long;

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    int n;
    cin >> n;
    vector<int> dp(100005, 100000);
    dp[0] = 0;
    int sum = 0;
    for (int i = 0; i < n; i++) {
        int a, b;
        cin >> a >> b;
        vector<int> dp2(100005, 100000);
        for (int j = 0; j <= sum; j++) {
            dp2[j + a] = min(dp2[j + a], dp[j]);
            dp2[j] = min(dp2[j], dp[j] + b);
        }
        sum += a;
        dp = move(dp2);
    }
    int ans = 100000;
    for (int i = 0; i <= 100000; i++) {
        ans = min(ans, max(i, dp[i]));
    }
    cout << ans << endl;
    return 0;
}