#include<bits/stdc++.h>
using namespace std;
#define ALL(x) x.begin(),x.end()
#define rep(i,n) for(int i=0;i<(n);i++)
#define debug(v) cout<<#v<<":";for(auto x:v){cout<<x<<' ';}cout<<endl;
#define mod 1000000007
using ll=long long;
const int INF=1000000000;
const ll LINF=1001002003004005006ll;
int dx[]={1,0,-1,0};
int dy[]={0,1,0,-1};
// ll gcd(ll a,ll b){return b?gcd(b,a%b):a;}
template<class T>bool chmax(T &a,const T &b){if(a<b){a=b;return true;}return false;}
template<class T>bool chmin(T &a,const T &b){if(b<a){a=b;return true;}return false;}

struct IOSetup{
    IOSetup(){
        cin.tie(0);
        ios::sync_with_stdio(0);
        cout<<fixed<<setprecision(12);
    }
} iosetup;

template<typename T1,typename T2>
ostream &operator<<(ostream &os,const pair<T1,T2>&p){
    os<<p.first<<" "<<p.second;
    return os;
}

template<typename T>
ostream &operator<<(ostream &os,const vector<T>&v){
    for(int i=0;i<(int)v.size();i++) os<<v[i]<<(i+1==v.size()?"":" ");
    return os;
}

signed main(){
    int n;cin>>n;
    int a[n],b[n];
    rep(i,n) cin>>a[i]>>b[i];
    vector<int> dp(150000,INF);// dp[me]=min(op)
    dp[0]=0;

    rep(k,n){
        vector<int> dp_new(150000,INF);
        int me=a[k],op=b[k];
        for(int i=140000;i>=0;i--){
            if(i-me>=0)chmin(dp_new[i],dp[i-me]);
            chmin(dp_new[i],dp[i]+op);
        }
        swap(dp,dp_new);
    }
    int ans=INF;
    rep(i,150000) chmin(ans,max(i,dp[i]));
    cout<<ans<<endl;
    return 0;
}