#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define INF 1000000000
int main() {
    ll n;
    cin >> n;
    vector<pair<ll, ll> > data(n);
    ll p1, p2;
    for(ll i=0;i<n;i++) {
        cin >> p1 >> p2;
        data[i] = make_pair(p1, p2);
    }

    ll asize;
    ll bsize = n/2;

    if(n%2 == 0) {
        asize = n/2;
    } else {
        asize = n/2+1;
    }

    vector<ll> a;
    vector<ll> b;

    for(ll i=0;i<(1<<asize);i++) {
        ll t1=0;
        ll t2=0;

        for(ll j=0;j<asize;j++) {
            if((i>>j)&1) {
                t1+=data[j].first;
            } else {
                t2+=data[j].second;
            }
        }
        a.push_back(t1-t2);
    }
    sort(a.begin(), a.end());



    for(ll i=0;i<(1<<bsize);i++) {
        ll t1=0;
        ll t2=0;

        for(ll j=0;j<bsize;j++) {
            if((i>>j)&1) {
                t1+=data[j+asize].first;
            } else {
                t2+=data[j+asize].second;
            }
        }
        b.push_back(t1-t2);
    }
    ll m4 = INF;
    sort(b.begin(), b.end());
    ll ans = INF;
    for(ll i=0;i<a.size();i++) {
        ll r = -a[i];
        ll lower = distance(b.begin(), lower_bound(b.begin(), b.end(), r));

        ll m1 = ans;
        ll m2 = abs(a[i]+ (b[lower]));
        ll m3 = abs(a[i]+ (b[lower-1]));
        if(lower+1 >= b.size()) {
            ll m4 = INF;
        } else {
            ll m4 = abs(a[i]+ (b[lower+1]));
        }
        ans = min(min(m1, m2), min(m3, m4));
    }
    cout << ans << endl;
}