結果
| 問題 | No.3214 small square |
| コンテスト | |
| ユーザー |
k1suxu
|
| 提出日時 | 2025-07-25 23:37:23 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 425 ms / 3,000 ms |
| コード長 | 8,765 bytes |
| コンパイル時間 | 3,438 ms |
| コンパイル使用メモリ | 298,496 KB |
| 実行使用メモリ | 69,356 KB |
| 最終ジャッジ日時 | 2025-07-25 23:37:41 |
| 合計ジャッジ時間 | 16,558 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / 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
#include <bits/stdc++.h>
using namespace std;
using std::cin;
using std::cout;
#define rep(i,n) for(int i = 0; i < (int)n; i++)
#define FOR(n) for(int i = 0; i < (int)n; i++)
#define repi(i,a,b) for(int i = (int)a; i < (int)b; i++)
#define all(x) x.begin(),x.end()
//#define mp make_pair
#define vi vector<int>
#define vvi vector<vi>
#define vvvi vector<vvi>
#define vvvvi vector<vvvi>
#define pii pair<int,int>
#define vpii vector<pair<int,int>>
template<typename T>
bool chmax(T &a, const T b) {if(a<b) {a=b; return true;} else {return false;}}
template<typename T>
bool chmin(T &a, const T b) {if(a>b) {a=b; return true;} else {return false;}}
using ll = long long;
using ld = long double;
using ull = unsigned long long;
const ll INF = numeric_limits<long long>::max() / 2;
const ld pi = 3.1415926535897932384626433832795028;
const ll mod = 998244353;
int dx[] = {1, 0, -1, 0, -1, -1, 1, 1};
int dy[] = {0, 1, 0, -1, -1, 1, -1, 1};
#define int long long
namespace internal {
// @param n `0 <= n`
// @return minimum non-negative `x` s.t. `n <= 2**x`
int ceil_pow2(int n) {
int x = 0;
while ((1U << x) < (unsigned int)(n)) x++;
return x;
}
// @param n `1 <= n`
// @return minimum non-negative `x` s.t. `(n & (1 << x)) != 0`
constexpr int bsf_constexpr(unsigned int n) {
int x = 0;
while (!(n & (1 << x))) x++;
return x;
}
// @param n `1 <= n`
// @return minimum non-negative `x` s.t. `(n & (1 << x)) != 0`
int bsf(unsigned int n) {
#ifdef _MSC_VER
unsigned long index;
_BitScanForward(&index, n);
return index;
#else
return __builtin_ctz(n);
#endif
}
} // namespace internal
template <class S,
S (*op)(S, S),
S (*e)(),
class F,
S (*mapping)(F, S),
F (*composition)(F, F),
F (*id)()>
struct lazy_segtree {
public:
lazy_segtree() : lazy_segtree(0) {}
explicit lazy_segtree(int n) : lazy_segtree(std::vector<S>(n, e())) {}
explicit lazy_segtree(const std::vector<S>& v) : _n(v.size()) {
log = internal::ceil_pow2(_n);
size = 1 << log;
d = std::vector<S>(2 * size, e());
lz = std::vector<F>(size, id());
for (int i = 0; i < _n; i++) d[size + i] = v[i];
for (int i = size - 1; i >= 1; i--) {
update(i);
}
}
void set(int p, S x) {
assert(0 <= p && p < _n);
p += size;
for (int i = log; i >= 1; i--) push(p >> i);
d[p] = x;
for (int i = 1; i <= log; i++) update(p >> i);
}
S get(int p) {
assert(0 <= p && p < _n);
p += size;
for (int i = log; i >= 1; i--) push(p >> i);
return d[p];
}
S prod(int l, int r) {
assert(0 <= l && l <= r && r <= _n);
if (l == r) return e();
l += size;
r += size;
for (int i = log; i >= 1; i--) {
if (((l >> i) << i) != l) push(l >> i);
if (((r >> i) << i) != r) push((r - 1) >> i);
}
S sml = e(), smr = e();
while (l < r) {
if (l & 1) sml = op(sml, d[l++]);
if (r & 1) smr = op(d[--r], smr);
l >>= 1;
r >>= 1;
}
return op(sml, smr);
}
S all_prod() { return d[1]; }
void apply(int p, F f) {
assert(0 <= p && p < _n);
p += size;
for (int i = log; i >= 1; i--) push(p >> i);
d[p] = mapping(f, d[p]);
for (int i = 1; i <= log; i++) update(p >> i);
}
void apply(int l, int r, F f) {
assert(0 <= l && l <= r && r <= _n);
if (l == r) return;
l += size;
r += size;
for (int i = log; i >= 1; i--) {
if (((l >> i) << i) != l) push(l >> i);
if (((r >> i) << i) != r) push((r - 1) >> i);
}
{
int l2 = l, r2 = r;
while (l < r) {
if (l & 1) all_apply(l++, f);
if (r & 1) all_apply(--r, f);
l >>= 1;
r >>= 1;
}
l = l2;
r = r2;
}
for (int i = 1; i <= log; i++) {
if (((l >> i) << i) != l) update(l >> i);
if (((r >> i) << i) != r) update((r - 1) >> i);
}
}
template <bool (*g)(S)> int max_right(int l) {
return max_right(l, [](S x) { return g(x); });
}
template <class G> int max_right(int l, G g) {
assert(0 <= l && l <= _n);
assert(g(e()));
if (l == _n) return _n;
l += size;
for (int i = log; i >= 1; i--) push(l >> i);
S sm = e();
do {
while (l % 2 == 0) l >>= 1;
if (!g(op(sm, d[l]))) {
while (l < size) {
push(l);
l = (2 * l);
if (g(op(sm, d[l]))) {
sm = op(sm, d[l]);
l++;
}
}
return l - size;
}
sm = op(sm, d[l]);
l++;
} while ((l & -l) != l);
return _n;
}
template <bool (*g)(S)> int min_left(int r) {
return min_left(r, [](S x) { return g(x); });
}
template <class G> int min_left(int r, G g) {
assert(0 <= r && r <= _n);
assert(g(e()));
if (r == 0) return 0;
r += size;
for (int i = log; i >= 1; i--) push((r - 1) >> i);
S sm = e();
do {
r--;
while (r > 1 && (r % 2)) r >>= 1;
if (!g(op(d[r], sm))) {
while (r < size) {
push(r);
r = (2 * r + 1);
if (g(op(d[r], sm))) {
sm = op(d[r], sm);
r--;
}
}
return r + 1 - size;
}
sm = op(d[r], sm);
} while ((r & -r) != r);
return 0;
}
private:
int _n, size, log;
std::vector<S> d;
std::vector<F> lz;
void update(int k) { d[k] = op(d[2 * k], d[2 * k + 1]); }
void all_apply(int k, F f) {
d[k] = mapping(f, d[k]);
if (k < size) lz[k] = composition(f, lz[k]);
}
void push(int k) {
all_apply(2 * k, lz[k]);
all_apply(2 * k + 1, lz[k]);
lz[k] = id();
}
};
//ref: https://atcoder.github.io/ac-library/document_ja/lazysegtree.html
using S = int;
S op(S x, S y) {
return max(x, y);
}
S e() {
return 0;
}
using F = int;
S mapping(F f, S x) {
return f + x;
}
F composition(F f, F g) {
return f + g;
}
F id() {
return 0;
}
void solve() {
// v[i]がマイナスの場合があるから、誰かが端っこで入らないことも考慮しないといけない
// 座標2倍して左右も追加すればいいかな
int n, a;
cin >> n >> a;
vi in_x(n), out_x(n), in_y(n), out_y(n), v(n);
FOR(n) {
int x, y;
cin >> x >> y >> v[i];
in_x[i] = x - a;
in_y[i] = y - a;
out_x[i] = x;
out_y[i] = y;
}
vi x_val, y_val;
for (auto &e : in_x) {
for (int offset : {-1, 0, 1}) {
x_val.emplace_back(e + offset);
}
}
for (auto &e : out_x) {
for (int offset : {-1, 0, 1}) {
x_val.emplace_back(e + offset);
}
}
for (auto &e : in_y) {
for (int offset : {-1, 0, 1}) {
y_val.emplace_back(e + offset);
}
}
for (auto &e : out_y) {
for (int offset : {-1, 0, 1}) {
y_val.emplace_back(e + offset);
}
}
sort(all(x_val));
sort(all(y_val));
for (auto &e : in_x) e = (int)(lower_bound(all(x_val), e) - x_val.begin());
for (auto &e : out_x) e = (int)(lower_bound(all(x_val), e) - x_val.begin());
for (auto &e : in_y) e = (int)(lower_bound(all(y_val), e) - y_val.begin());
for (auto &e : out_y) e = (int)(lower_bound(all(y_val), e) - y_val.begin());
const int xsz = (int)x_val.size();
const int ysz = (int)y_val.size();
vector<vpii> evs(xsz);
FOR(n) evs[in_x[i]].emplace_back(i, 1);
FOR(n) evs[out_x[i]].emplace_back(i, -1);
lazy_segtree<S, op, e, F, mapping, composition, id> seg(ysz);
int ans = 0;
for (auto &e : evs) {
for (auto [i, flg] : e) {
if (flg == 1) {
// 追加
seg.apply(in_y[i], out_y[i] + 1, v[i]);
}
}
chmax(ans, seg.all_prod());
for (auto [i, flg] : e) {
if (flg == -1) {
// 削除
seg.apply(in_y[i], out_y[i] + 1, -v[i]);
}
}
}
cout << ans << endl;
}
signed main() {
cin.tie(nullptr);
ios::sync_with_stdio(false);
solve();
return 0;
}
k1suxu