結果
| 問題 |
No.2404 Vertical Throw Up
|
| コンテスト | |
| ユーザー |
kwm_t
|
| 提出日時 | 2023-08-05 14:57:59 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 39 ms / 2,000 ms |
| コード長 | 3,779 bytes |
| コンパイル時間 | 1,713 ms |
| コンパイル使用メモリ | 196,296 KB |
| 最終ジャッジ日時 | 2025-02-15 23:35:07 |
|
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 30 |
ソースコード
#include <bits/stdc++.h>
//#include <atcoder/all>
using namespace std;
//using namespace atcoder;
//using mint = modint1000000007;
//const int mod = 1000000007;
//using mint = modint998244353;
//const int mod = 998244353;
//const int INF = 1e9;
const long long LINF = 1e18;
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define rep2(i,l,r)for(int i=(l);i<(r);++i)
#define rrep(i, n) for (int i = (n-1); i >= 0; --i)
#define rrep2(i,l,r)for(int i=(r-1);i>=(l);--i)
#define all(x) (x).begin(),(x).end()
#define allR(x) (x).rbegin(),(x).rend()
#define endl "\n"
#define P pair<int,int>
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }
// https://ei1333.github.io/library/structure/convex-hull-trick/dynamic-li-chao-tree.hpp
/**
* @brief Dynamic-Li-Chao-Tree
* @docs docs/dynamic-li-chao-tree.md
*/
template< typename T, T x_low, T x_high, T id >
struct DynamicLiChaoTree {
struct Line {
T a, b;
Line(T a, T b) : a(a), b(b) {}
inline T get(T x) const { return a * x + b; }
};
struct Node {
Line x;
Node *l, *r;
Node(const Line &x) : x{ x }, l{ nullptr }, r{ nullptr } {}
};
Node *root;
DynamicLiChaoTree() : root{ nullptr } {}
Node *add_line(Node *t, Line &x, const T &l, const T &r, const T &x_l, const T &x_r) {
if (!t) return new Node(x);
T t_l = t->x.get(l), t_r = t->x.get(r);
if (t_l <= x_l && t_r <= x_r) {
return t;
}
else if (t_l >= x_l && t_r >= x_r) {
t->x = x;
return t;
}
else {
T m = (l + r) / 2;
if (m == r) --m;
T t_m = t->x.get(m), x_m = x.get(m);
if (t_m > x_m) {
swap(t->x, x);
if (x_l >= t_l) t->l = add_line(t->l, x, l, m, t_l, t_m);
else t->r = add_line(t->r, x, m + 1, r, t_m + x.a, t_r);
}
else {
if (t_l >= x_l) t->l = add_line(t->l, x, l, m, x_l, x_m);
else t->r = add_line(t->r, x, m + 1, r, x_m + x.a, x_r);
}
return t;
}
}
void add_line(const T &a, const T &b) {
Line x(a, b);
root = add_line(root, x, x_low, x_high, x.get(x_low), x.get(x_high));
}
Node *add_segment(Node *t, Line &x, const T &a, const T &b, const T &l, const T &r, const T &x_l, const T &x_r) {
if (r < a || b < l) return t;
if (a <= l && r <= b) {
Line y{ x };
return add_line(t, y, l, r, x_l, x_r);
}
if (t) {
T t_l = t->x.get(l), t_r = t->x.get(r);
if (t_l <= x_l && t_r <= x_r) return t;
}
else {
t = new Node(Line(0, id));
}
T m = (l + r) / 2;
if (m == r) --m;
T x_m = x.get(m);
t->l = add_segment(t->l, x, a, b, l, m, x_l, x_m);
t->r = add_segment(t->r, x, a, b, m + 1, r, x_m + x.a, x_r);
return t;
}
void add_segment(const T &l, const T &r, const T &a, const T &b) {
Line x(a, b);
root = add_segment(root, x, l, r - 1, x_low, x_high, x.get(x_low), x.get(x_high));
}
T query(const Node *t, const T &l, const T &r, const T &x) const {
if (!t) return id;
if (l == r) return t->x.get(x);
T m = (l + r) / 2;
if (m == r) --m;
if (x <= m) return min(t->x.get(x), query(t->l, l, m, x));
else return min(t->x.get(x), query(t->r, m + 1, r, x));
}
T query(const T &x) const {
return query(root, x_low, x_high, x);
}
};
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
long long a; cin >> a;
DynamicLiChaoTree<long long, 0, 100000008, LINF>dp;
int q; cin >> q;
while (q--) {
int t; cin >> t;
if (1 == t) {
long long s, t; cin >> s >> t;
// ax+b
long long p = -a * (s + t);
long long q = a * s *t;
dp.add_segment(s, t, p, q);
}
else {
long long t; cin >> t;
auto val = dp.query(t) * -1;
val += -a * t * t;
cout << max(0LL, val) << endl;
}
}
return 0;
}
kwm_t