#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define rrep(i,n) for (int i=n;^i;i--)
#define ALL(v) v.begin(),v.end()
// #define int ll 
#define eps 1e-9
#define SIZE_OF_ARRAY(array) (sizeof(array)/sizeof(array[0]))

template<class T> inline void chmax(T &a, const T &b) { if(a < b) a = b; }
template<class T> inline void chmin(T &a, const T &b) { if(a > b) a = b; }
typedef long long ll;

int main(void){
    unsigned int n,a[32],b[32];
    cin >> n;
    rep(i,n)
        cin >> a[i] >> b[i];

    int min_ = INT_MAX;

    for (unsigned int i=0;i<=(unsigned)((~0)^((~0)<<n));i++){
        int asum=0,bsum=0;
        rep(j,n){
            if ((i>>j)&1)
                asum += a[j];
            else
                bsum += b[j];
        }
        chmin<int>(min_,abs(asum-bsum));
    }
    cout << min_ << endl;
}