/*
    Author:zeke
    
    pass System Test!
    GET AC!!
*/
#include <iostream>
#include <queue>
#include <vector>
#include <iostream>
#include <vector>
#include <string>
#include <cassert>
#include <algorithm>
#include <functional>
#include <cmath>
#include <queue>
#include <set>
#include <stack>
#include <deque>
#include <map>
#include <iomanip>
#include <utility>
#include <stack>
#include <bitset>
using ll = long long;
using ld = long double;
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define all(x) (x).begin(), (x).end()
#define rep3(var, min, max) for (ll(var) = (min); (var) < (max); ++(var))
#define repi3(var, min, max) for (ll(var) = (max)-1; (var) + 1 > (min); --(var))
#define Mp(a, b) make_pair((a), (b))
#define F first
#define S second
#define Icin(s) \
    ll(s);      \
    cin >> (s);
#define Scin(s) \
    ll(s);      \
    cin >> (s);
template <class T>
bool chmax(T &a, const T &b)
{
    if (a < b)
    {
        a = b;
        return 1;
    }
    return 0;
}
template <class T>
bool chmin(T &a, const T &b)
{
    if (b < a)
    {
        a = b;
        return 1;
    }
    return 0;
}
typedef pair<ll, ll> P;
typedef vector<ll> V;
typedef vector<V> VV;
typedef vector<P> VP;
ll mod = 1e9 + 7;
ll MOD = 1e9 + 7;
ll INF = 1e18;
vector<vector<ll>> calcNext(const string &S)
{
    int n = (int)S.size();
    vector<vector<ll>> res(n + 1, vector<ll>(26, n));
    for (int i = n - 1; i >= 0; --i)
    {
        for (int j = 0; j < 26; ++j)
            res[i][j] = res[i + 1][j];
        res[i][S[i] - 'a'] = i;
    }
    return res;
}
int main()
{
    cin.tie(0);
    ios::sync_with_stdio(false);
    ll n;
    cin>>n;
    VP vec(n);
    VP vec2;
    rep(i,n)cin>>vec[i].F>>vec[i].S;
    ll m = n / 2;
    for(int i=m;i<n;i++){
        vec2.push_back(vec[i]);
    }
 //   cout<<vec2.size()<<endl;
    V temp;
    rep(i,(1<<m)){
        ll res = 0;
        rep(j,m){
            if(i&(1<<j)){
                res += vec[j].F;
            }else{
                res -= vec[j].S;
            }
        }
        temp.push_back(res);
    }
    V temp2;
   // rep(i,vec2.size())cout<<vec2[i].F<<" "<<vec2[i].S<<endl;;
   // cout<<endl;
    rep(i,(1<<(vec2.size()))){
        ll res1 = 0;
        rep(j,vec2.size()){
            if(i&(1<<j)){
                res1 -= vec2[j].F;
            }else{
                res1 += vec2[j].S;
            }
        }
        temp2.push_back(res1);
    }
    //rep(i,temp2.size())cout<<temp2[i]<<" ";
  //  cout<<endl;
    sort(all(temp2));
    //cout<<temp2.size()<<endl;
    //cout<<temp.size()<<endl;
    ll res = 1e18;
    rep(i,temp.size()){
        ll k=lower_bound(all(temp2),temp[i])-temp2.begin();
     //   cout<<temp[i]<<" "<<temp2[k]<<endl;
        if(k>=1){
            chmin(res,min(abs(-temp2[k]+temp[i]),abs(-temp2[k-1]+temp[i])));
        }else{
            chmin(res,abs(-temp2[k]+temp[i]));
        }
   //     cout<<k<<endl;
    }
    cout << res << endl;
}