// URL: https://yukicoder.me/problems/no/180

import std.algorithm, std.array, std.bitmanip, std.container, std.conv, std.format,
       std.functional, std.math, std.range, std.traits, std.typecons, std.stdio, std.string;

version(unittest) {} else
void main()
{
  int N; io.getV(N);
  struct L { long a, b; }
  L[] l; io.getS!("a", "b")(N, l);
  l.sort!"a.b<b.b";

  auto cht1 = ConvexHullTrick!long(), cht2 = ConvexHullTrick!long();
  foreach (li; l) cht1.add(-li.b, -li.a);
  foreach_reverse (li; l) cht2.add(li.b, li.a);

  auto f(int x) { return -cht1.query(x)-cht2.query(x); }

  io.put(iota(1, int.max).upperBoundBy!(x => f(x+1)-f(x), "a<=b")(0).front);
}

pure nothrow @nogc @safe
{
  auto lowerBoundBy(alias conv = "a", alias comp = "a<b", R, T)(const R a, const T v)
  {
    return a.sortedTuple!(conv, comp).lowerBound(tuple(a.front, v)).map!"a[0]";
  }

  auto upperBoundBy(alias conv = "a", alias comp = "a<b", R, T)(const R a, const T v)
  {
    return a.sortedTuple!(conv, comp).upperBound(tuple(a.front, v)).map!"a[0]";
  }

  auto sortedTuple(alias conv = "a", alias comp = "a<b", R)(const R a)
  {
    alias convFun = unaryFun!conv, compFun = binaryFun!comp;
    return a.map!(e => tuple(e, convFun(e))).assumeSorted!((a, b) => compFun(a[1], b[1]));
  }
}

struct ConvexHullTrick(T, alias comp = "a>=b")
{
  pure nothrow @safe
  {
    void add(T a, T b)
    {
      auto line = Line(a, b);
      while (lines.length >= 2 && check(lines[$-2], lines[$-1], line))
        lines = lines[0..$-1];
      lines ~= line;
    }

    T query(T x)
    {
      ptrdiff_t low = -1, high = cast(ptrdiff_t)lines.length-1;
      while (high-low > 1) {
        auto mid = (high+low)/2;
        (compFun(lines[mid].f(x), lines[mid+1].f(x)) ? low : high) = mid;
      }
      return lines[high].f(x);
    }
  }

  private
  {
    alias compFun = binaryFun!comp;

    struct Line
    {
      T a, b;
      auto opCmp(Line r) const
      {
        if (a < r.a) return -1;
        else if (a > r.a) return 1;
        if (b < r.b) return -1;
        else if (b > r.b) return 1;
        return 0;
      }
      auto f(T x) { return a*x+b; }
    }
    Line[] lines;

    pure nothrow @nogc @safe
    {
      bool check(Line l1, Line l2, Line l3)
      {
        if (l1 < l3) swap(l1, l3);
        return (l3.b-l2.b)*(l2.a-l1.a) >= (l2.b-l1.b)*(l3.a-l2.a);
      }
    }
  }
}

auto io = IO!()();
import std.stdio;
struct IO(alias IN = stdin, alias OUT = stdout)
{
  import std.meta : allSatisfy;
  import core.stdc.stdlib : exit;

  void getV(T...)(ref T v)
  {
    foreach (ref w; v) get(w);
  }
  void getA(T)(size_t n, ref T v)
    if (hasAssignableElements!T)
  {
    v = new T(n);
    foreach (ref w; v) get(w);
  }
  void getC(T...)(size_t n, ref T v)
    if (allSatisfy!(hasAssignableElements, T))
  {
    foreach (ref w; v) w = new typeof(w)(n);
    foreach (i; 0..n) foreach (ref w; v) get(w[i]);
  }
  void getM(T)(size_t r, size_t c, ref T v)
    if (hasAssignableElements!T && hasAssignableElements!(ElementType!T))
  {
    v = new T(r);
    foreach (ref w; v) getA(c, w);
  }
  template getS(E...)
  {
    void getS(T)(size_t n, ref T v)
    {
      v = new T(n);
      foreach (ref w; v) foreach (e; E) mixin("get(w."~e~");");
    }
  }

  const struct PutConf
  {
    bool newline = true, flush, exit;
    string floatFormat = "%.10f", delimiter = " ";
  }

  void put(alias conf = "{}", T...)(T v)
  {
    mixin("const PutConf c = "~conf~"; putMain!c(v);");
  }
  void putB(alias conf = "{}", S, T)(bool c, S t, T f)
  {
    if (c) put!conf(t);
    else put!conf(f);
  }
  void putRaw(T...)(T v)
  {
    OUT.write(v);
    OUT.writeln;
  }

  private
  {
    dchar[] buf;
    auto sp = (new dchar[](0)).splitter;

    void nextLine()
    {
      IN.readln(buf);
      sp = buf.splitter;
    }
    void get(T)(ref T v)
    {
      if (sp.empty) nextLine();
      v = sp.front.to!T;
      sp.popFront();
    }

    void putMain(PutConf c, T...)(T v)
    {
      foreach (i, w; v) {
        putOne!c(w);
        if (i+1 < v.length) OUT.write(c.delimiter);
      }
      static if (c.newline) OUT.writeln;
      static if (c.flush) OUT.flush();
      static if (c.exit) exit(0);
    }
    void putOne(PutConf c, T)(T v)
    {
      static if (isInputRange!T && !isSomeString!T) putRange!c(v);
      else static if (isFloatingPoint!T) OUT.write(format(c.floatFormat, v));
      else static if (hasMember!(T, "fprint")) v.fprint(OUT);
      else OUT.write(v);
    }
    void putRange(PutConf c, T)(T v)
    {
      auto w = v;
      while (!w.empty) {
        putOne!c(w.front); w.popFront();
        if (!w.empty) OUT.write(c.delimiter);
      }
    }
  }
}