Language: C++

#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
#define ll long long
#define BIT(n) (1LL << (n))
#define BITF(n, i) (((n) >> (i)) & 1)
#define REP(i, n) for (ll i = 0; i < n; i++)
#define FOR(i, m, n) for (ll i = m; i < n; i++)
#define REPI(i, x) for (ll i = 1; i <= x; i++)
#define FORI(i, m, n) for (ll i = m; i <= n; i++)
#define REPR(i, n) for (ll i = n; i >= 0; i--)
#define REPZ(i, x) for (ll i = 0; i <= x; i++)
#define FORA(i, n) for (auto &&i : n)
#define POW(a, b) ((ll)(pow(a, b) + .5))
#define MODULO(a, b) (((a) % (b)) < 0 ? (a) % (b) + (b) : (a) % (b))
#define DUMPOUT cerr
// vector
template <typename T> istream &operator>>(istream &is, vector<T> &vec) {
  for (T &x : vec) is >> x;
  return is;
}
// pair
template <typename T, typename U> ostream &operator<<(ostream &os, pair<T, U> &pair_var) {
  os << "(" << pair_var.first << ", " << pair_var.second << ")";
  return os;
}
// vector
template <typename T> ostream &operator<<(ostream &os, const vector<T> &vec) {
  os << "{";
  REP(i, (ll)vec.size())
  os << vec[i] << (i + 1 == (ll)vec.size() ? "" : ", ");
  os << "}";
  return os;
}
// map
template <typename T, typename U> ostream &operator<<(ostream &os, map<T, U> &map_var) {
  os << "{";
  FORA(itr, map_var) {
    os << *itr;
    itr++;
    if (itr != map_var.end()) os << ", ";
    itr--;
  }
  os << "}";
  return os;
}
// set
template <typename T> ostream &operator<<(ostream &os, set<T> &set_var) {
  os << "{";
  FORA(itr, set_var) {
    os << *itr;
    itr++;
    if (itr != set_var.end()) os << ", ";
    itr--;
  }
  os << "}";
  return os;
}
void dump_func() { DUMPOUT << endl; }
template <class Head, class... Tail> void dump_func(Head &&head, Tail &&... tail) {
  DUMPOUT << head;
  if (sizeof...(Tail) > 0) DUMPOUT << ", ";
  dump_func(std::move(tail)...);
}
#ifdef DEBUG_
#define DEB
#define DUMP(...)                                                             \
  DUMPOUT << "  " << string(#__VA_ARGS__) << ": "                             \
          << "[" << to_string(__LINE__) << ":" << __FUNCTION__ << "]" << endl \
          << "    ",                                                          \
      dump_func(__VA_ARGS__)
#define PRINTARR(x, y)                                     \
  cerr << #x << "=\n";                                     \
  for (auto itr = x; itr != y; itr++) cerr << *itr << " "; \
  cerr << endl;
#define PRINTARR2(x, i0, i1)                                      \
  cerr << #x << "=\n";                                            \
  for (ll ii0 = 0; ii0 < i0; ii0++) {                             \
    for (ll ii1 = 0; ii1 < i1; ii1++) cerr << x[ii0][ii1] << " "; \
    cerr << endl;                                                 \
  }
#else
#define DEB if (false)
#define DUMP(...)
#define PRINTARR(x, y)
#define PRINTARR2(x, i0, i1)
#endif
#define ALL(v) v.begin(), v.end()
#define fst first
#define snd second
#define mp make_pair
#define pb push_back
#define epb emplace_back
#define pint pair<ll, ll>
#define pdouble pair<double, double>
#define ld long double
using namespace std;
template <class T> bool chmax(T &a, const T &b) {
  if (a < b) {
    a = b;
    return 1;
  }
  return 0;
}
template <class T> bool chmin(T &a, const T &b) {
  if (a > b) {
    a = b;
    return 1;
  }
  return 0;
}
template <class T> using vec = std::vector<T>;
template <class T> void print(const T &x) { cout << x << "\n"; }
// const ll MOD = 1000000007, INF0 = 1061109567, INF = INF0 * INF0;
// const double EPS = 1e-7, PI = acos(-1.0);
const ll dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};
/*
[&] { return; }();下のスラッシュを2つ追加しただけ.上のスラッシュを2つにすれば外れる.
//*/
#define MAXN 200110
const double EPS = 1e-8;
const double INF = 1e12;
typedef complex<double> P;
namespace std {
bool operator<(const P &a, const P &b) { return real(a) != real(b) ? real(a) < real(b) : imag(a) < imag(b); }
}  // namespace std
double cross(const P &a, const P &b) { return imag(conj(a) * b); }
double dot(const P &a, const P &b) { return real(conj(a) * b); }
struct L : public vector<P> {
  L(const P &a, const P &b) {
    push_back(a);
    push_back(b);
  }
};
typedef vector<P> G;
struct C {
  P p;
  double r;
  C(const P &p, double r) : p(p), r(r) {}
};
int ccw(P a, P b, P c) {
  b -= a;
  c -= a;
  if (cross(b, c) > 0) return +1;    // counter clockwise
  if (cross(b, c) < 0) return -1;    // clockwise
  if (dot(b, c) < 0) return +2;      // c--a--b on line
  if (norm(b) < norm(c)) return -2;  // a--b--c on line
  return 0;
}
vector<P> convex_hull(vector<P> ps) {
  int n = ps.size(), k = 0;
  sort(ps.begin(), ps.end());
  vector<P> ch(2 * n);
  for (int i = 0; i < n; ch[k++] = ps[i++])  // lower-hull
    while (k >= 2 && ccw(ch[k - 2], ch[k - 1], ps[i]) <= 0) --k;
  for (int i = n - 2, t = k + 1; i >= 0; ch[k++] = ps[i--])  // upper-hull
    while (k >= t && ccw(ch[k - 2], ch[k - 1], ps[i]) <= 0) --k;
  ch.resize(k - 1);
  return ch;
}
ll x[MAXN], y[MAXN];
//http://www.prefield.com/algorithm/
signed main() {
  cin.tie(0), ios::sync_with_stdio(false);
  cout << fixed << setprecision(12);
  ll N;
  cin >> N;
  vector<P> xy(N);
  REP(i, N) {
    ll p, q;
    cin >> p >> q;
    xy[i] = complex<double>(p, q);
  }
  vector<P> res = convex_hull(xy);
  ll resS = res.size();
  ll ans = 0;
  REP(i, resS) {
    REP(j, i) {
      ll i0 = res[i].real();
      ll i1 = res[i].imag();
      ll j0 = res[j].real();
      ll j1 = res[j].imag();
      chmax(ans, abs(i0 - j0) + abs(i1 - j1));
    }
  }
  print(ans);
  DUMP(res.size());
}

Compiler output:
a.cc:3:10: fatal error: atcoder/all: No such file or directory
    3 | #include <atcoder/all>
      |          ^~~~~~~~~~~~~
compilation terminated.