#include<cstdio>
#include<vector>
#include<set>
#include<cstdlib>


using namespace std;

using ll=long long;
using vll=vector<ll>;


int main(void)
{
	int n;

	while(scanf("%d", &n)==1)
	{
		vll a(n), b(n);
		set<ll> s;

		for(int i=0;i<n;i++)
		{
			scanf("%lld%lld", &a[i], &b[i]);
		}

		s.insert(0);
		for(int i=0;i<n;i++)
		{
			auto t=s;
			s.clear();
			for(auto te:t)
			{
				s.insert(te+a[i]);
				s.insert(te-b[i]);
			}
		}

		auto it=s.begin();
		ll ans=llabs(*it);
		for(;it!=s.end();++it)
		{
			if(ans>llabs(*it))
			{
				ans=llabs(*it);
			}
		}
		printf("%lld\n", ans);
	}

	return 0;
}