#include <cstdio>
#include <cstdint>
#include <cassert>
#include <vector>
#include <algorithm>
#include <map>

template <class Tp>
class lines {
  std::map<Tp, Tp> ll;

  bool is_redundant(const typename std::map<Tp, Tp>::iterator& it) const {
    if (it == ll.begin() || it == ll.end()) return false;
    auto next = std::next(it);
    if (next == ll.end()) return false;
    auto prev = std::prev(it);

    Tp a1, b1, a2, b2, a3, b3;
    std::tie(a1, b1) = *prev;
    std::tie(a2, b2) = *it;
    std::tie(a3, b3) = *next;

    // fprintf(stderr, "[%d, %d] [%d, %d] [%d, %d]\n", a1, b1, a2, b2, a3, b3);
    return (b1-b2) * (a3-a2) <= (b2-b3) * (a2-a1);
  }

public:
  void append(Tp a, Tp b) {
    if (ll.empty()) {
      ll.emplace(a, b);
      // fprintf(stderr, "(+) %dx%+d: empty set\n", a, b);
      return;
    }

    auto it = ll.lower_bound(a);
    if (it != ll.end() && it->first == a) {
      if (it->second <= b) {
        // fprintf(stderr, "(x) %dx%+d: one with less constant exists\n", a, b);
        return;
      }
      it->second = b;
      // fprintf(stderr, "(+) %dx%+d: update constant\n", a, b);
    } else if (it == ll.begin() || it == ll.end()) {
      it = ll.emplace_hint(it, a, b);
      // fprintf(stderr, "(+) %dx%+d: either ends\n", a, b);
    } else {
      it = ll.emplace_hint(it, a, b);
      if (is_redundant(it)) {
        ll.erase(it);
        // fprintf(stderr, "(x) %dx%+d: redundant\n", a, b);
        return;
      }
      // fprintf(stderr, "(+) %dx%+d: normally\n", a, b);
    }

    auto prev = std::prev(it);
    while (is_redundant(prev)) {
      // fprintf(stderr, "(-) %dx%+d: prev\n", prev->first, prev->second);
      ll.erase(prev);
      prev = std::prev(it);
    }

    auto next = std::next(it);
    while (is_redundant(next)) {
      // fprintf(stderr, "(-) %dx%+d: next\n", next->first, next->second);
      next = ll.erase(next);
    }
  }

  Tp min_at(Tp x) const {
    assert(!ll.empty());
    if (ll.size() == 1) {
      Tp a = ll.begin()->first;
      Tp b = ll.begin()->second;
      return a*x + b;
    }

    Tp lb = ll.begin()->first;
    auto last = std::prev(ll.end());
    Tp ub = last->first;
    while (ub-lb > 1) {
      Tp mid = (lb+ub) / 2;
      auto it1 = ll.upper_bound(mid);
      auto it0 = std::prev(it1);
      Tp a0, b0, a1, b1;
      std::tie(a0, b0) = *it0;
      std::tie(a1, b1) = *it1;
      ((a0*x+b0 < a1*x+b1)? ub:lb) = mid;
    }

    auto it1 = ll.upper_bound(lb);
    auto it0 = std::prev(it1);

    Tp a0, b0, a1, b1;
    std::tie(a0, b0) = *it0;
    std::tie(a1, b1) = *it1;
    return std::min(a0*x+b0, a1*x+b1);
  }

  void inspect() const {
    // for (const auto& p: ll)
    //   fprintf(stderr, "%dx%+d\n", p.first, p.second);
  }
};

int main() {
  size_t N;
  scanf("%zu", &N);

  lines<intmax_t> lmin, lmax;
  for (size_t i = 0; i < N; ++i) {
    intmax_t a, b;
    scanf("%jd %jd", &a, &b);
    lmin.append(b, a);
    lmax.append(-b, -a);
  }

  intmax_t res = 1e18;
  intmax_t x = 0;
  for (intmax_t i = 1; i <= 1000000; ++i) {
    intmax_t y = -lmax.min_at(i) - lmin.min_at(i);
    if (res > y) {
      res = y;
      x = i;
    }
  }
  printf("%jd\n", x);
}