luogu2577

#include <algorithm>
#include <iostream>
#include <cstring>
#include <cstdio>
using namespace std;
struct Node{
    int aa, bb;
}nd[205];
int n, sum[205], dp[40005], ans=0x3f3f3f3f;
bool cmp(Node x, Node y){
    return x.bb>y.bb;
}
int main(){
    cin>>n;
    memset(dp, 0x3f, sizeof(dp));
    for(int i=1; i<=n; i++)
        scanf("%d %d", &nd[i].aa, &nd[i].bb);
    sort(nd+1, nd+1+n, cmp);
    for(int i=1; i<=n; i++) sum[i] = sum[i-1] + nd[i].aa;
    dp[0] = 0;
    for(int i=1; i<=n; i++){
        for(int j=sum[i-1]; j>=0; j--){
            dp[j+nd[i].aa] = min(dp[j+nd[i].aa], max(dp[j], j+nd[i].aa+nd[i].bb));
            dp[j] = max(dp[j], sum[i]-j+nd[i].bb);
        }
    }
    for(int i=1; i<=sum[n]; i++)    ans = min(ans, dp[i]);
    cout<<ans<<endl;
    return 0;
}