import java.io.IOException; import java.io.InputStream; import java.util.NoSuchElementException; public class Main { public static void main(String[] args)throws Exception{ FastScanner sc = new FastScanner(); int n = sc.nextInt(); int a[] = new int[n]; int b[] = new int[n]; for(int i = 0 ; i< n ; i++) { a[i] = sc.nextInt(); b[i] = sc.nextInt(); } long min = 160000000000L; long ans = 0; long asum = 0; long bsum = 0; int cou = 0; boolean[] tf = new boolean[n]; long i; for(i= 0 ; i < Math.pow(2.0,(double)n); ) { for(int j = 0 ; j< n ; j++) { if(tf[j]) asum += a[j]; else bsum += b[j]; } i++; if(!(i < Math.pow(2.0,(double)n)) )break; long k = i ; for(int q = 0 ; q < n ;q++) { tf[q]= false; } int l= 0; while(k > 0) { if(k %2 == 1)tf[l] = true; //else if(tf[l]==true)tf[l++]= false; l++; k /= 2; } ans = abs(asum - bsum); if(ans < min) min =ans; asum =0; bsum =0; //System.out.println(cou); } System.out.println(min); } private static long abs(long l) { // TODO 自動生成されたメソッド・スタブ if(l > 0) return l; else return -l; } } class FastScanner { private final InputStream in = System.in; private final byte[] buffer = new byte[1024]; private int ptr = 0; private int buflen = 0; private boolean hasNextByte() { if (ptr < buflen) { return true; }else{ ptr = 0; try { buflen = in.read(buffer); } catch (IOException e) { e.printStackTrace(); } if (buflen <= 0) { return false; } } return true; } private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;} private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;} public boolean hasNext() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte();} public String next() { if (!hasNext()) throw new NoSuchElementException(); StringBuilder sb = new StringBuilder(); int b = readByte(); while(isPrintableChar(b)) { sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } public long nextLong() { if (!hasNext()) throw new NoSuchElementException(); long n = 0; boolean minus = false; int b = readByte(); if (b == '-') { minus = true; b = readByte(); } if (b < '0' || '9' < b) { throw new NumberFormatException(); } while(true){ if ('0' <= b && b <= '9') { n *= 10; n += b - '0'; }else if(b == -1 || !isPrintableChar(b)){ return minus ? -n : n; }else{ throw new NumberFormatException(); } b = readByte(); } } public int nextInt() { long nl = nextLong(); if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException(); return (int) nl; } public double nextDouble() { return Double.parseDouble(next());} }