#include <bits/stdc++.h>
using namespace std;

#define int long long

#define pb push_back
#define fi first
#define se second
#define rep(i,s,n) for(int i = s;i<n;i++)
#define repe(i,s,n) for(int i = s;i<=n;i++)
#define rrep(i,s,n) for(int i = (n)-1;i>=(s);i--)
#define all(v) (v).begin(),(v).end()
#define chmin(a,b) a=min((a),(b))
#define chmax(a,b) a=max((a),(b))
#define low(a,b) lower_bound(all(a),(b))
#define upp(a,b) upper_bound(all(a),(b))
#define fill(i,n) memset(i,n,sizeof(i))
#define endl '\n'
#define IOS() ios_base::sync_with_stdio(0);cin.tie(0)
typedef long long ll;
typedef pair<int,int>pint;
typedef vector<int>vint;
typedef vector<vint> vvint;
typedef vector<pint>vpint;
typedef pair<pint,int> P1;
typedef pair<int,pint> P2;
typedef pair<pint,pint> PP;
static const ll maxLL = (ll)1 << 62;
const ll MOD=1000000007;
const ll INF=1e18;

int N,a[101],b[101];
int from[101010],to[101010];

signed main() {
    IOS();
    cin>>N;
    rep(i,0,101010)from[i]=INF;
    from[0]=0;
    
    rep(i,0,N){
        cin>>a[i]>>b[i];
        rep(j,0,101010)to[j]=INF;
        rep(j,0,101010){
            chmin(to[j+a[i]],from[j]);
            chmin(to[j],from[j]+b[i]);
        }
        swap(from,to);
    }
    
    int minans=INF;
    rep(i,0,101010)chmin(minans,max(i,from[i]));
    cout<<minans<<endl;
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    




















































    return 0;
}