#include "bits/stdc++.h"
using namespace std;
#define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i))
#define rep(i,j) FOR(i,0,j)
#define each(x,y) for(auto &(x):(y))
#define mp make_pair
#define all(x) (x).begin(),(x).end()
#define debug(x) cout<<#x<<": "<<(x)<<endl
#define smax(x,y) (x)=max((x),(y))
#define smin(x,y) (x)=min((x),(y))
#define MEM(x,y) memset((x),(y),sizeof (x))
#define sz(x) (int)(x).size()
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<ll> vll;

bool dp[20001];

int main(){
    int N;
    cin >> N;
    vi V(N), T(N);
    rep(i, N)scanf("%d%d", &V[i], &T[i]);
    vector<pii> vtk(N);
    rep(i, N)vtk[i] = mp(V[i] + T[i], i);
    sort(all(vtk));
    dp[0] = 1;
    rep(i, N){
        int k = vtk[i].second;
        int v = V[k], t = T[k];
        for(int j = t - 1; j >= 0; --j){
            dp[j + v] |= dp[j];
        }
    }
    for(int i = 20000; i >= 0; --i){
        if(dp[i]){
            cout << i << endl;
            break;
        }
    }
}