#include<iostream>
#include<cstdio>
#include<vector>
#include<map>
#include<tuple>
#include<string>
#include<sstream>
#include<cmath>
#include<climits>
#include<algorithm>
#include<bitset>
#include<set>
#include<stack>
using namespace std;  
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
#define rep(i,n) for(ll i=0;i<(n);i++)  
#define tii tuple<int,int>
#define tiii tuple<int,int,int>
#define mt make_tuple
#define pb push_back  
#define ALL(a) (a).begin(),(a).end()
#define FST first
#define SEC second  
const int INF = (INT_MAX/2);
const ll LLINF = (LLONG_MAX/2);
const double eps = 1e-5;
const double PI = M_PI;  
#define DEB cerr<<"!"<<endl
#define SHOW(a,b) cerr<<(a)<<" "<<(b)<<endl
#define SHOWARRAY(ar,i,j) REP(a,i)REP(b,j)cerr<<ar[a][b]<<((b==j-1)?((a==i-1)?("\n\n"):("\n")):(" "))
#define DIV 1000000007
ll pow(ll x,ll n,ll m){ll r=1;while(n>0){if((n&1)==1)r=r*x%m;x=x*x%m;n>>=1;}return r%m;}

int main(){
  int n; cin >> n;
  map<ll,int> m;
  m[0] = 1;
  rep(i,16){
    if(i == n) break;
    ll a,b; cin >> a >> b;
    map<ll,int> tm;
    for(auto itr:m){
      tm[itr.FST+a] = 1;
      tm[itr.FST-b] = 1;
    }
    m = tm;
  }
  map<ll,int> m2;
  m2[0] = 1;
  for(int i = 16; i < n;i++){
    ll a,b; cin >> a >> b;
    map<ll,int> tm;
    for(auto itr:m2){
      tm[itr.FST+a] = 1;
      tm[itr.FST-b] = 1;
    }
    m2 = tm;
  }
  ll ans = LLINF;
  //SHOW(m.size(),m2.size());
  for(auto itr1:m){
    ans = min(ans,abs(itr1.FST+(*m2.lower_bound(-itr1.FST)).FST));
    if(((m2.lower_bound(-itr1.FST))) != (--m2.end())) 
      ans = min(ans,abs(itr1.FST+(*(++(m2.lower_bound(-itr1.FST)))).FST));
    if(((m2.lower_bound(-itr1.FST))) != (m2.begin()))
      ans = min(ans,abs(itr1.FST+(*(--(m2.lower_bound(-itr1.FST)))).FST));
  }
  cout << ans << endl;
  return 0;
}