結果
| 問題 |
No.1826 Fruits Collecting
|
| コンテスト | |
| ユーザー |
emthrm
|
| 提出日時 | 2022-01-29 00:03:37 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 186 ms / 2,000 ms |
| コード長 | 4,433 bytes |
| コンパイル時間 | 2,614 ms |
| コンパイル使用メモリ | 207,300 KB |
| 最終ジャッジ日時 | 2025-01-27 17:30:17 |
|
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 43 |
ソースコード
#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
#define FOR(i,m,n) for(int i=(m);i<(n);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()
using ll = long long;
constexpr int INF = 0x3f3f3f3f;
constexpr long long LINF = 0x3f3f3f3f3f3f3f3fLL;
constexpr double EPS = 1e-8;
constexpr int MOD = 1000000007;
// constexpr int MOD = 998244353;
constexpr int DY[]{1, 0, -1, 0}, DX[]{0, -1, 0, 1};
constexpr int DY8[]{1, 1, 0, -1, -1, -1, 0, 1}, DX8[]{0, -1, -1, -1, 0, 1, 1, 1};
template <typename T, typename U> inline bool chmax(T& a, U b) { return a < b ? (a = b, true) : false; }
template <typename T, typename U> inline bool chmin(T& a, U b) { return a > b ? (a = b, true) : false; }
struct IOSetup {
IOSetup() {
std::cin.tie(nullptr);
std::ios_base::sync_with_stdio(false);
std::cout << fixed << setprecision(20);
}
} iosetup;
template <typename T>
struct SegmentTree {
using Monoid = typename T::Monoid;
SegmentTree(int n) : SegmentTree(std::vector<Monoid>(n, T::id())) {}
SegmentTree(const std::vector<Monoid> &a) : n(a.size()) {
while (p2 < n) p2 <<= 1;
dat.assign(p2 << 1, T::id());
for (int i = 0; i < n; ++i) dat[i + p2] = a[i];
for (int i = p2 - 1; i > 0; --i) dat[i] = T::merge(dat[i << 1], dat[(i << 1) + 1]);
}
void set(int idx, Monoid val) {
idx += p2;
dat[idx] = val;
while (idx >>= 1) dat[idx] = T::merge(dat[idx << 1], dat[(idx << 1) + 1]);
}
Monoid get(int left, int right) const {
Monoid l_res = T::id(), r_res = T::id();
for (left += p2, right += p2; left < right; left >>= 1, right >>= 1) {
if (left & 1) l_res = T::merge(l_res, dat[left++]);
if (right & 1) r_res = T::merge(dat[--right], r_res);
}
return T::merge(l_res, r_res);
}
Monoid operator[](const int idx) const { return dat[idx + p2]; }
template <typename G>
int find_right(int left, G g) {
if (left >= n) return n;
Monoid val = T::id();
left += p2;
do {
while (!(left & 1)) left >>= 1;
Monoid nx = T::merge(val, dat[left]);
if (!g(nx)) {
while (left < p2) {
left <<= 1;
nx = T::merge(val, dat[left]);
if (g(nx)) {
val = nx;
++left;
}
}
return left - p2;
}
val = nx;
++left;
} while (__builtin_popcount(left) > 1);
return n;
}
template <typename G>
int find_left(int right, G g) {
if (right <= 0) return -1;
Monoid val = T::id();
right += p2;
do {
--right;
while (right > 1 && (right & 1)) right >>= 1;
Monoid nx = T::merge(dat[right], val);
if (!g(nx)) {
while (right < p2) {
right = (right << 1) + 1;
nx = T::merge(dat[right], val);
if (g(nx)) {
val = nx;
--right;
}
}
return right - p2;
}
val = nx;
} while (__builtin_popcount(right) > 1);
return -1;
}
private:
int n, p2 = 1;
std::vector<Monoid> dat;
};
namespace monoid {
template <typename T>
struct RangeMinimumQuery {
using Monoid = T;
static constexpr Monoid id() { return std::numeric_limits<Monoid>::max(); }
static Monoid merge(const Monoid &a, const Monoid &b) { return std::min(a, b); }
};
template <typename T>
struct RangeMaximumQuery {
using Monoid = T;
static constexpr Monoid id() { return std::numeric_limits<Monoid>::lowest(); }
static Monoid merge(const Monoid &a, const Monoid &b) { return std::max(a, b); }
};
template <typename T>
struct RangeSumQuery {
using Monoid = T;
static constexpr Monoid id() { return 0; }
static Monoid merge(const Monoid &a, const Monoid &b) { return a + b; }
};
} // monoid
int main() {
int n; cin >> n;
vector<int> a(n + 1, 0), b(n + 1, 0), v(n + 1, 0);
REP(i, n) {
int t, x; cin >> t >> x >> v[i];
a[i] = t + x;
b[i] = t - x;
}
vector<int> ys = b;
sort(ALL(ys));
ys.erase(unique(ALL(ys)), ys.end());
REP(i, n + 1) b[i] = lower_bound(ALL(ys), b[i]) - ys.begin();
vector<int> ord(n + 1);
iota(ALL(ord), 0);
sort(ALL(ord), [&](int l, int r) -> bool { return a[l] != a[r] ? a[l] < a[r] : b[l] < b[r]; });
SegmentTree<monoid::RangeMaximumQuery<ll>> seg(ys.size());
for (int i : ord) {
if (i == n) {
seg.set(b[i], 0);
} else {
seg.set(b[i], seg.get(0, b[i] + 1) + v[i]);
}
}
cout << seg.get(0, ys.size()) << '\n';
}
emthrm