oj.uz

답안 #573534

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
573534 2022-06-06T19:07:48 Z vovamr 학교 설립 (IZhO13_school) C++17
95 / 100
 552 ms 43416 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define fi first
#define se second
#define ll long long
#define ld long double
#define all(x) 	(x).begin(), (x).end()
#define pb push_back
#define mpp make_pair
#define ve vector
using namespace std;
using namespace __gnu_pbds;
template<class T> using oset = tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
const ll inf = 1e18; const int iinf = 1e9;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
template <typename T> inline bool chmin(T& a, T b) { return (a > b ? a = b, 1 : 0); }
template <typename T> inline bool chmax(T& a, T b) { return (a < b ? a = b, 1 : 0); }

struct Node {
	Node *l = nullptr;
	Node *r = nullptr;
	ll p, k, s, sz;
	Node() {}
	Node(ll x) : k(x), s(x) { p = 1 + rng() % inf; sz = 1; }
}; typedef Node* node;
inline ll s(node t) { return !t ? 0 : t->s; }
inline ll sz(node t) { return !t ? 0 : t->sz; }
inline void upd(node t) { if(!t){return;} t->s = s(t->l) + t->k + s(t->r); t->sz = sz(t->l) + 1 + sz(t->r); }
inline node mg(node a, node b) {
	if (!a || !b) return (!a ? b : a);
	if (a->p > b->p) { a->r = mg(a->r, b); upd(a); return a; }
	else { b->l = mg(a, b->l); upd(b); return b; }
}
inline pair<node,node> sp(node t, int x) {
	if (!t) return {nullptr, nullptr};
	int q = sz(t->l);
	if (x > q) { auto tt = sp(t->r, x - q - 1); t->r = tt.fi; upd(t); return {t, tt.se}; }
	else { auto tt = sp(t->l, x); t->l = tt.se; upd(t); return {tt.fi, t}; }
}
inline pair<node,node> spk(node t, int x) {
	if (!t) return {nullptr, nullptr};
	if (x >= t->k) { auto tt = spk(t->r, x); t->r = tt.fi; upd(t); return {t, tt.se}; }
	else { auto tt = spk(t->l, x); t->l = tt.se; upd(t); return {tt.fi, t}; }
}
inline void pr(node t) {
	if (!t) return;
	if (t->l) pr(t->l);
	cout << t->k << " ";
	if (t->r) pr(t->r);
}

inline void insert(node &t, int x) {
	auto [t1, t2] = spk(t, x);
	t = mg(t1, mg(new Node(x), t2));
}

inline void solve() {
	int n, A, B;
	cin >> n >> A >> B;

	ve<pii> a(n);
	for (auto &[x, y] : a) cin >> x >> y;
	sort(all(a), [](const pii &a, const pii &b) { return a.fi - a.se < b.fi - b.se; });
	reverse(all(a));

	ve<ll> sum(n, -inf);

	node t = nullptr;
	for (int i = n - 1; ~i; --i) {
		insert(t, a[i].se);
		auto [t1, t2] = sp(t, sz(t) - B);
		sum[i] = s(t2);
		t = mg(t1, t2);
	}

	ll ans = 0;

	node t1 = nullptr;
	for (int i = 0; i < n - 1; ++i) {
		insert(t1, a[i].fi);
		auto [t2, t3] = sp(t1, sz(t1) - A);
		chmax(ans, sum[i + 1] + s(t3));
		t1 = mg(t2, t3);
	}

	cout << ans;
}

signed main() {
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	int q = 1; // cin >> q;
	while (q--) solve();
	cerr << fixed << setprecision(3) << "Time execution: " << (double)clock() / CLOCKS_PER_SEC << endl;
}

Subtask #1
95.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Output isn't correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 5 ms 928 KB Output is correct
8 Correct 5 ms 980 KB Output is correct
9 Correct 5 ms 956 KB Output is correct
10 Correct 6 ms 972 KB Output is correct
11 Correct 6 ms 980 KB Output is correct
12 Correct 6 ms 1020 KB Output is correct
13 Correct 49 ms 5712 KB Output is correct
14 Correct 126 ms 12192 KB Output is correct
15 Correct 281 ms 23448 KB Output is correct
16 Correct 328 ms 26480 KB Output is correct
17 Correct 377 ms 31996 KB Output is correct
18 Correct 424 ms 35036 KB Output is correct
19 Correct 457 ms 37668 KB Output is correct
20 Correct 552 ms 43416 KB Output is correct