#include <iostream>
using namespace std;

int main(){
	int n;
	cin >> n;
	int64_t a[n], b[n];
	for(int i = 0; i < n; i++) cin >> a[i] >> b[i];
	if(n == 1){
		cout << min(a[0], b[0]) << endl;
		return 0;
	}
	int64_t chi_a = 0, chi_b = 0, diff = 1ll << 60;
	for(int i = 0; i < 1 << (n / 2); i++){
		int64_t tmp_a = 0, tmp_b = 0;
		for(int j = 0; j < n / 2; j++){
			if((i >> j) & 1) tmp_a += a[j];
			else tmp_b += b[j];
		}
		if(abs(tmp_a - tmp_b) < diff){
			diff = abs(tmp_a - tmp_b);
			chi_a = tmp_a;
			chi_b = tmp_b;
		}
	}
	for(int i = 0; i < (1 << (n / 2)) + n % 2; i++){
		int64_t tmp_a = chi_a, tmp_b = chi_b;
		for(int j = 0; j < n / 2 + n % 2; j++){
			if((i >> j) & 1) tmp_a += a[n / 2 + j];
			else tmp_b += b[n / 2 + j];
		}
		if(abs(tmp_a - tmp_b) < diff){
			diff = abs(tmp_a - tmp_b);
			chi_a = tmp_a;
			chi_b = tmp_b;
		}
	}
	cout << abs(chi_a - chi_b) << endl;
}