結果

問題 No.1874 Minimum of Sum of Rectangles
ユーザー noshi91
提出日時 2022-03-11 22:32:58
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 133 ms / 3,000 ms
コード長 4,210 bytes
コンパイル時間 1,088 ms
コンパイル使用メモリ 105,444 KB
最終ジャッジ日時 2025-01-28 08:50:37
ジャッジサーバーID
(参考情報)
judge1 / judge1
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 39
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

//#define NDEBUG
#pragma warning(disable : 4146)
#include <algorithm>
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <iomanip>
#include <ios>
#include <iostream>
#include <utility>
#include <vector>
namespace n91 {
using i32 = std::int32_t;
using i64 = std::int64_t;
using u32 = std::uint32_t;
using u64 = std::uint64_t;
using isize = std::ptrdiff_t;
using usize = std::size_t;
using f64 = double;
struct rep {
struct itr {
usize i;
constexpr itr(const usize i) noexcept : i(i) {}
void operator++() noexcept { ++i; }
constexpr usize operator*() const noexcept { return i; }
constexpr bool operator!=(const itr x) const noexcept { return i != x.i; }
};
const itr f, l;
constexpr rep(const usize f, const usize l) noexcept
: f(std::min(f, l)), l(l) {}
constexpr auto begin() const noexcept { return f; }
constexpr auto end() const noexcept { return l; }
};
struct revrep {
struct itr {
usize i;
constexpr itr(const usize i) noexcept : i(i) {}
void operator++() noexcept { --i; }
constexpr usize operator*() const noexcept { return i; }
constexpr bool operator!=(const itr x) const noexcept { return i != x.i; }
};
const itr f, l;
constexpr revrep(const usize f, const usize l) noexcept
: f(l - 1), l(std::min(f, l) - 1) {}
constexpr auto begin() const noexcept { return f; }
constexpr auto end() const noexcept { return l; }
};
template <class T> auto md_vec(const usize n, const T &value) {
return std::vector<T>(n, value);
}
template <class... Args> auto md_vec(const usize n, Args... args) {
return std::vector<decltype(md_vec(args...))>(n, md_vec(args...));
}
template <class T> constexpr T difference(const T &a, const T &b) noexcept {
return a < b ? b - a : a - b;
}
template <class T> void chmin(T &a, const T &b) noexcept {
if (b < a)
a = b;
}
template <class T> void chmax(T &a, const T &b) noexcept {
if (a < b)
a = b;
}
template <class F> class rec_lambda {
F f;
public:
rec_lambda(F &&f_) : f(std::forward<F>(f_)) {}
template <class... Args> auto operator()(Args &&... args) const {
return f(*this, std::forward<Args>(args)...);
}
};
template <class T> T scan() {
T ret;
std::cin >> ret;
return ret;
}
constexpr char eoln = '\n';
i64 floor_div(const i64 n, const i64 d) {
assert(d != 0);
return n / d - static_cast<i64>((n ^ d) < 0 && n % d != 0);
}
i64 ceil_div(const i64 n, const i64 d) {
assert(d != 0);
return n / d + static_cast<i64>((n ^ d) >= 0 && n % d != 0);
}
#ifdef N91_LOCAL
#define OJ_LOCAL(a, b) b
#else
#define OJ_LOCAL(a, b) a
#endif
} // namespace n91
#include <atcoder/segtree>
namespace n91 {
struct S {
i64 xy, x, y, c;
i64 get(const i64 a, const i64 b) const {
return xy * a * b + x * a + y * b + c;
}
};
S op(S a, S b) { return {a.xy + b.xy, a.x + b.x, a.y + b.y, a.c + b.c}; }
S e() { return {0, 0, 0, 0}; }
void main_() {
const usize n = scan<usize>();
std::vector<std::pair<i64, i64>> ps(n);
for (auto &[x, y] : ps) {
std::cin >> x >> y;
}
static constexpr usize MAX = OJ_LOCAL(1000000, 100);
atcoder::segtree<S, op, e> seg(MAX + 1);
for (const auto &[x, y] : ps) {
S s = seg.get(x);
s.xy += 1;
s.x -= y;
s.y -= x;
s.c += x * y;
seg.set(x, s);
}
i64 ans = 1e18;
std::sort(ps.begin(), ps.end(),
[](const auto &a, const auto &b) { return a.second < b.second; });
for (const auto &p : ps) {
const i64 x = p.first;
const i64 y = p.second;
{
const S all = seg.all_prod();
const i64 all_d = all.xy * y + all.x;
const usize i = seg.max_right(0, [&](const S s) {
const i64 d = s.xy * y + s.x;
return all_d - 2 * d <= 0;
});
const S s = seg.prod(0, i);
const i64 f = all.get(i, y) - 2 * s.get(i, y);
chmin(ans, f);
}
{
S s = seg.get(x);
s.xy -= 2;
s.x += 2 * y;
s.y += 2 * x;
s.c -= 2 * x * y;
seg.set(x, s);
}
}
std::cout << ans << eoln;
}
} // namespace n91
int main() {
//*
std::ios::sync_with_stdio(false);
std::cin.tie(nullptr);
//*/
std::cout << std::fixed << std::setprecision(20);
n91::main_();
return 0;
}
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