結果
| 問題 |
No.3214 small square
|
| コンテスト | |
| ユーザー |
risujiroh
|
| 提出日時 | 2025-07-25 22:32:56 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 256 ms / 3,000 ms |
| コード長 | 2,835 bytes |
| コンパイル時間 | 4,024 ms |
| コンパイル使用メモリ | 305,460 KB |
| 実行使用メモリ | 18,432 KB |
| 最終ジャッジ日時 | 2025-07-25 22:33:14 |
| 合計ジャッジ時間 | 11,755 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 40 |
ソースコード
#if __INCLUDE_LEVEL__ == 0
#include __BASE_FILE__
void Solve() {
int n;
int64_t A;
IN(n, A);
A *= 2;
vector<int64_t> X(n), Y(n), V(n);
for (int i : Rep(0, n)) {
IN(X[i], Y[i], V[i]);
X[i] *= 2, Y[i] *= 2;
}
vector<int64_t> Ux(n), Uy(n);
for (int i : Rep(0, n)) {
Ux[i] = V[i] < 0 ? X[i] - A - 1 : X[i];
Uy[i] = V[i] < 0 ? Y[i] - A - 1 : Y[i];
}
ranges::sort(Ux);
ranges::sort(Uy);
vector<vector<tuple<int, int, int64_t>>> events(n + 1);
for (int i : Rep(0, n)) {
// [X[i] - A, X[i] + 1)
int lx = int(ranges::lower_bound(Ux, X[i] - A) - Ux.begin());
int rx = int(ranges::lower_bound(Ux, X[i] + 1) - Ux.begin());
int ly = int(ranges::lower_bound(Uy, Y[i] - A) - Uy.begin());
int ry = int(ranges::lower_bound(Uy, Y[i] + 1) - Uy.begin());
events[lx].emplace_back(ly, ry, V[i]);
events[rx].emplace_back(ly, ry, -V[i]);
}
auto op = [](int64_t a, int64_t b) { return max(a, b); };
auto e = []() { return int64_t(0); };
auto mapping = [](int64_t f, int64_t x) { return f + x; };
auto composition = [](int64_t f, int64_t g) { return f + g; };
auto id = []() { return int64_t(0); };
int64_t ans = 0;
atcoder::lazy_segtree<int64_t, op, e, int64_t, mapping, composition, id> seg(n);
for (int x : Rep1(0, n)) {
for (auto [l, r, v] : events[x]) {
seg.apply(l, r, v);
}
SetMax(ans, seg.all_prod());
}
OUT(ans);
}
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
Solve();
}
#elif __INCLUDE_LEVEL__ == 1
#include <bits/stdc++.h>
#include <atcoder/lazysegtree.hpp>
template <class T> concept MyRange = std::ranges::range<T> && !std::convertible_to<T, std::string_view>;
template <class T> concept MyTuple = std::__is_tuple_like<T>::value && !MyRange<T>;
namespace std {
istream& operator>>(istream& is, MyRange auto&& r) {
for (auto&& e : r) is >> e;
return is;
}
istream& operator>>(istream& is, MyTuple auto&& t) {
apply([&](auto&... xs) { (is >> ... >> xs); }, t);
return is;
}
ostream& operator<<(ostream& os, MyRange auto&& r) {
auto sep = "";
for (auto&& e : r) os << exchange(sep, " ") << e;
return os;
}
ostream& operator<<(ostream& os, MyTuple auto&& t) {
auto sep = "";
apply([&](auto&... xs) { ((os << exchange(sep, " ") << xs), ...); }, t);
return os;
}
} // namespace std
using namespace std;
#define LAMBDA2(x, y, ...) ([&](auto&& x, auto&& y) -> decltype(auto) { return __VA_ARGS__; })
#define Rep(...) [](int l, int r) { return views::iota(min(l, r), r); }(__VA_ARGS__)
#define Rep1(...) [](int l, int r) { return Rep(l, r + 1); }(__VA_ARGS__)
#define SetMax(...) LAMBDA2(x, y, x < y && (x = y, 1))(__VA_ARGS__)
#define IN(...) (cin >> forward_as_tuple(__VA_ARGS__))
#define OUT(...) (cout << forward_as_tuple(__VA_ARGS__) << '\n')
#endif // __INCLUDE_LEVEL__ == 1
risujiroh