#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
#define INF (1<<30)
#define INFLL (1ll<<60)
typedef pair<double, int> P;
typedef pair<int, P> E;
#define MOD (1000000007ll)
#define l_ength size
#define EPS (1e-10)

void add_mod(ll &a, ll b){
	a += b;
	a %= MOD;
}

void mul_mod(ll &a, ll b){
	a *= b;
	a %= MOD;
}

int main(void){
	int n,i,j,a[123],b[123],x[123456],y[123456],ans=INF;
	cin >> n;
	fill(x,x+123456,0);
	for(i=0; i<n; ++i){
		cin >> a[i];
		cin >> b[i];
	}
	for(i=0; i<n; ++i){
		fill(y,y+123456,INF);
		for(j=0; j<=100000; ++j){
			if(j+a[i]<=100000){
				y[j+a[i]] = min(x[j],y[j+a[i]]);
			}
			y[j] = min(y[j],x[j]+b[i]);
		}
		for(j=0; j<=100000; ++j){
			x[j] = y[j];
		}
	}
	for(i=0; i<=100000; ++i){
		ans = min(ans,max(i,x[i]));
	}
	cout << ans << endl;
	return 0;
}