import java.io.*; import java.util.*; public class Main_yukicoder545 { private static Scanner sc; private static Printer pr; private static void solve() { 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(); } List d1 = new ArrayList<>(); List d2 = new ArrayList<>(); int m = Math.min(16, n); for (int i = 0; i < 0x1 << m; i++) { long sa = 0; long sb = 0; for (int j = 0; j < m; j++) { if ((i & 0x1 << j) != 0) { sa += a[j]; } else { sb += b[j]; } } d1.add(sb - sa); } Collections.sort(d1); m = Math.max(0, n - 16); if (m == 0) { long min = Long.MAX_VALUE; for (long e : d1) { min = Math.min(min, Math.abs(e)); } pr.println(min); return; } for (int i = 0; i < 0x1 << m; i++) { long sa = 0; long sb = 0; for (int j = 0; j < m; j++) { if ((i & 0x1 << j) != 0) { sa += a[j + 16]; } else { sb += b[j + 16]; } } d2.add(sb - sa); } Collections.sort(d2); long min = Long.MAX_VALUE; for (long e : d2) { int idx = Collections.binarySearch(d1, -e); if (idx < 0) { idx = -(idx + 1); } min = Math.min(min, d1.get(idx)); if (idx + 1 < d1.size()) { min = Math.min(min, d1.get(idx + 1)); } if (idx - 1 >= 0) { min = Math.min(min, d1.get(idx - 1)); } } pr.println(min); } // --------------------------------------------------- public static void main(String[] args) { sc = new Scanner(System.in); pr = new Printer(System.out); solve(); pr.close(); sc.close(); } @SuppressWarnings("unused") private static class Scanner { BufferedReader br; Scanner (InputStream in) { br = new BufferedReader(new InputStreamReader(in)); } private boolean isPrintable(int ch) { return ch >= '!' && ch <= '~'; } private boolean isCRLF(int ch) { return ch == '\n' || ch == '\r' || ch == -1; } private int nextPrintable() { try { int ch; while (!isPrintable(ch = br.read())) { if (ch == -1) { throw new NoSuchElementException(); } } return ch; } catch (IOException e) { throw new NoSuchElementException(); } } String next() { try { int ch = nextPrintable(); StringBuilder sb = new StringBuilder(); do { sb.appendCodePoint(ch); } while (isPrintable(ch = br.read())); return sb.toString(); } catch (IOException e) { throw new NoSuchElementException(); } } int nextInt() { try { // parseInt from Integer.parseInt() boolean negative = false; int res = 0; int limit = -Integer.MAX_VALUE; int radix = 10; int fc = nextPrintable(); if (fc < '0') { if (fc == '-') { negative = true; limit = Integer.MIN_VALUE; } else if (fc != '+') { throw new NumberFormatException(); } fc = br.read(); } int multmin = limit / radix; int ch = fc; do { int digit = ch - '0'; if (digit < 0 || digit >= radix) { throw new NumberFormatException(); } if (res < multmin) { throw new NumberFormatException(); } res *= radix; if (res < limit + digit) { throw new NumberFormatException(); } res -= digit; } while (isPrintable(ch = br.read())); return negative ? res : -res; } catch (IOException e) { throw new NoSuchElementException(); } } long nextLong() { try { // parseLong from Long.parseLong() boolean negative = false; long res = 0; long limit = -Long.MAX_VALUE; int radix = 10; int fc = nextPrintable(); if (fc < '0') { if (fc == '-') { negative = true; limit = Long.MIN_VALUE; } else if (fc != '+') { throw new NumberFormatException(); } fc = br.read(); } long multmin = limit / radix; int ch = fc; do { int digit = ch - '0'; if (digit < 0 || digit >= radix) { throw new NumberFormatException(); } if (res < multmin) { throw new NumberFormatException(); } res *= radix; if (res < limit + digit) { throw new NumberFormatException(); } res -= digit; } while (isPrintable(ch = br.read())); return negative ? res : -res; } catch (IOException e) { throw new NoSuchElementException(); } } float nextFloat() { return Float.parseFloat(next()); } double nextDouble() { return Double.parseDouble(next()); } String nextLine() { try { int ch; while (isCRLF(ch = br.read())) { if (ch == -1) { throw new NoSuchElementException(); } } StringBuilder sb = new StringBuilder(); do { sb.appendCodePoint(ch); } while (!isCRLF(ch = br.read())); return sb.toString(); } catch (IOException e) { throw new NoSuchElementException(); } } void close() { try { br.close(); } catch (IOException e) { // throw new NoSuchElementException(); } } } private static class Printer extends PrintWriter { Printer(PrintStream out) { super(out); } } }