#include <bits/stdc++.h>

using namespace std;


typedef int32_t h_int32;
typedef int64_t h_int64;
typedef uint32_t uh_int32;
typedef uint64_t uh_int64;
typedef h_int64 h_int;

#define REP( i, n ) for(int i = 0; i < ( int )( n ); ++i )
#define REPR( i, n ) for(int i = ( int )( n ); i >= 0; --i)
#define FOR( i, a, n ) for(int i = ( int )( a ); i < ( int )( n ); ++i )
#define FORR( i, a, n ) for(int i = ( int )( n ); i >= ( int )( a ); --i)

#define VINIT( v, type, n )vector<type> v; v.resize( n );
#define VINIT2( v, type, n, a )vector<type> v; v.resize( n, a );
#define VCIN( v, type, n ) VINIT( v, type, n ) REP( i, n ) cin >> v[i];
#define ALL( x ) x.begin(), x.end()

#define DOUT( x ) cerr << #x << " = " << x << "\n";
#define COUT( x ) cout << ( x ) << "\n";

#define INF 999999999



vector<h_int> f( int m, vector<pair<h_int, h_int> >::iterator v )
{
        vector<h_int> res;
        REP( i, 1 << m )
        {
                h_int a = 0;
                h_int b = 0;
                REP( j, m )
                {
                        if( ( i >> j ) & 1 )
                        {
                                a += ( v + j )->first;
                        }
                        else
                        {
                                b += ( v + j )->second;
                        }
                }
                res.push_back( a - b );
        }
        sort( ALL( res ) );
        return res;
}

signed main()
{
        ios::sync_with_stdio( false );
        cin.tie( 0 );

        int n;
        cin >> n;
        vector<pair<h_int, h_int> > v;
        v.resize( n );
        REP( i, n ) cin >> v[i].first >> v[i].second;

        int m = n / 2;
        // 0~n/2の全探索
        auto res1 = f( m, v.begin() );
        // n/2~nの全探索
        auto res2 = f( n - m, v.begin() + m );

        vector<h_int> res;
        REP( i, res1.size() )
        {
                auto it = lower_bound( ALL( res2 ), -res1[i] );
                res.push_back( abs( res1[i] + *it ) );
                if(it != res2.begin() )
                {
                        res.push_back( abs( res1[i] + *( --it ) ) );
                }
        }
        sort( ALL( res ) );
        COUT( res[0] );
        return 0;
}