import java.util.*;

public class No546 {

	public static void main(String[] args) {
		try (final Scanner sc = new Scanner(System.in)) {
			int n = sc.nextInt();
			long[] A = new long[n];
			long[] B = new long[n];
			for (int i = 0; i < n; i++) {
				A[i] = sc.nextLong();
				B[i] = sc.nextLong();
			}
			if (n == 1) {
				System.out.println(Math.min(A[0], B[0]));
				return;
			}
			long[] s1 = new long[1<<(n/2)];
			long[] s2 = new long[1<<((n+1)/2)];
			for (int i = 0; i < 1<<(n/2); i++) {
				long s = 0;
				for (int j = 0; j < n/2; j++) {
					if ((i>>j&1) == 1) {
						s += A[j];
					} else {
						s -= B[j];
					}
				}
				s1[i] = s;
			}
			for (int i = 0; i < 1<<((n+1)/2); i++) {
				long s = 0;
				for (int j = 0; j < (n+1)/2; j++) {
					if ((i>>j&1) == 1) {
						s += A[n/2+j];
					} else {
						s -= B[n/2+j];
					}
				}
				s2[i] = s;
			}
			Arrays.sort(s1);
			Arrays.sort(s2);
			long ans = Long.MAX_VALUE;
			for (int i = 0, j = s2.length - 1; i < s1.length; i++) {
				for (; j > 0; j--) {
					long cur = Math.abs(s1[i] + s2[j]);
					long next = Math.abs(s1[i] + s2[j-1]);
					ans = Math.min(ans, next);
					ans = Math.min(ans, next);
					if (cur < next) {
						break;
					}
				}
			}
			System.out.println(ans);
		}
	}
	
	static long gcd(long n, long r) { return r == 0 ? n : gcd(r, n % r); }
	static long lcm(long n, long r) { return n/gcd(n,r)*r; }
	static void dump(Object... objects) { System.err.println(Arrays.deepToString(objects)); }
}