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답안 #780365

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
780365 2023-07-12T08:32:39 Z ymm 별자리 3 (JOI20_constellation3) C++17
100 / 100
 296 ms 42048 KB 
#include <bits/stdc++.h>
#define Loop(x, l, r) for (ll x = (l); x < (r); ++x)
#define LoopR(x, l, r) for (ll x = (r)-1; x >= (l); --x)
typedef long long ll;
typedef std::pair<int,int> pii;
using namespace std;


struct node {
	int l, r;
	int pos;
	ll C;
	vector<node *> adj;
	ll dp;
	int st, ft;
};

vector<node> nds;

const int N = 200'010;
pii a[N];
struct star {
	int x, y;
	ll C;
} stars[N];
int n, m;

namespace segmx {
	int a[2*N];

	void up(int l, int r, int x) {
		l += N;
		r += N;
		while (l < r) {
			if (l&1) { a[l] = max(a[l], x); ++l; }
			if (r&1) { --r; a[r] = max(a[r], x); }
			l /= 2;
			r /= 2;
		}
	}
	int get(int p) {
		int ans = 0;
		p += N;
		while (p) {
			ans = max(ans, a[p]);
			p /= 2;
		}
		return ans;
	}
}
namespace segadd {
	ll a[2*N];

	void up(int l, int r, ll x) {
		l += N;
		r += N;
		while (l < r) {
			if (l&1) { a[l] = a[l]+x; ++l; }
			if (r&1) { --r; a[r] = a[r]+x; }
			l /= 2;
			r /= 2;
		}
	}
	ll get(int p) {
		ll ans = 0;
		p += N;
		while (p) {
			ans += a[p];
			p /= 2;
		}
		return ans;
	}
}

void mk_nodes()
{
	sort(stars, stars+m, [](star &a, star &b) {
		return a.y < b.y;
	});
	sort(a, a+n);
	set<int> cur_buildings = {-1, n};
	int p = n-1;
	LoopR (i,0,m) {
		while (p >= 0 && a[p].first > stars[i].y)
			cur_buildings.insert(a[p--].second);
		int l = *--cur_buildings.lower_bound(stars[i].x)+1;
		int r = *cur_buildings.upper_bound(stars[i].x);
		node dard = {
			.l = l,
			.r = r,
			.pos = stars[i].x,
			.C = stars[i].C,
			.adj = {},
			.dp = 0,
			.st = 0,
			.ft = 0,
		};
		nds.push_back(dard);
	}
	sort(nds.begin(), nds.end(), [](node &a, node &b) {
		return a.l < b.l || (a.l == b.l && a.r > b.r);
	});
}

void process(node *t)
{
	node *c = NULL;
	t->dp = 0;
	for (auto u : t->adj) {
		t->dp += u->dp;
		if (t->pos < u->l || u->r <= t->pos)
			continue;
		assert(c == NULL);
		c = u;
	}
	ll x = t->dp + t->C;
	if (c) {
		x -= c->dp;
		int pos = segmx::get(t->pos);
		//cout << t->l << ' ' << t->pos << ' ' << t->r << " vv " << pos << '\n';
		x += segadd::get(nds[pos].st);
	}
	for (auto u : t->adj)
		segadd::up(u->st, u->ft, t->dp - u->dp);
	segadd::up(t->st, t->st+1, t->dp);
	t->dp = max(t->dp, x);
}

void dfs_stft(node *t, int &pos)
{
	t->st = pos++;
	for (node *u : t->adj)
		dfs_stft(u, pos);
	t->ft = pos;
}

void dfs_dp(node *t)
{
	for (node *u : t->adj)
		dfs_dp(u);
	process(t);
}

int main()
{
	cin.tie(0) -> sync_with_stdio(false);
	cin >> n;
	Loop (i,0,n) {
		cin >> a[i].first;
		a[i].second = i;
	}
	cin >> m;
	ll sumC = 0;
	Loop (i,0,m) {
		cin >> stars[i].x >> stars[i].y >> stars[i].C;
		sumC += stars[i].C;
		--stars[i].x; --stars[i].y;
		//cout << stars[i].x << ' ' << stars[i].y << '\n';
	}
	mk_nodes();
	vector<node *> vec;
	vector<node *> rts;
	Loop (i,0,nds.size()) {
		node *t = &nds[i];
		while (vec.size() && vec.back()->r <= t->l)
			vec.pop_back();
		if (vec.size())
			vec.back()->adj.push_back(t);
		else
			rts.push_back(t);
		vec.push_back(t);
		segmx::up(t->l, t->r, i);
	}
	int dard = 0;
	for (auto t : rts)
		dfs_stft(t, dard);
	ll ans = 0;
	for (auto t : rts) {
		dfs_dp(t);
		ans += t->dp;
	}
	Loop (i,0,nds.size()) {
		//cout << nds[i].l << ' ' << nds[i].pos << ' ' << nds[i].r << " -> " << nds[i].dp << '\n';
	}
	cout << sumC - ans << '\n';
}

Compilation message

constellation3.cpp: In function 'int main()':
constellation3.cpp:2:42: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    2 | #define Loop(x, l, r) for (ll x = (l); x < (r); ++x)
      |                                          ^
constellation3.cpp:163:2: note: in expansion of macro 'Loop'
  163 |  Loop (i,0,nds.size()) {
      |  ^~~~
constellation3.cpp:2:42: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    2 | #define Loop(x, l, r) for (ll x = (l); x < (r); ++x)
      |                                          ^
constellation3.cpp:182:2: note: in expansion of macro 'Loop'
  182 |  Loop (i,0,nds.size()) {
      |  ^~~~

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 456 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 460 KB Output is correct
6 Correct 1 ms 460 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 460 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 464 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 452 KB Output is correct
16 Correct 1 ms 460 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 1 ms 468 KB Output is correct

Subtask #2
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 456 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 460 KB Output is correct
6 Correct 1 ms 460 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 460 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 464 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 452 KB Output is correct
16 Correct 1 ms 460 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 1 ms 468 KB Output is correct
23 Correct 2 ms 724 KB Output is correct
24 Correct 2 ms 724 KB Output is correct
25 Correct 2 ms 724 KB Output is correct
26 Correct 2 ms 720 KB Output is correct
27 Correct 2 ms 724 KB Output is correct
28 Correct 2 ms 724 KB Output is correct
29 Correct 2 ms 724 KB Output is correct
30 Correct 2 ms 724 KB Output is correct
31 Correct 3 ms 724 KB Output is correct
32 Correct 3 ms 724 KB Output is correct
33 Correct 2 ms 852 KB Output is correct
34 Correct 2 ms 724 KB Output is correct
35 Correct 2 ms 852 KB Output is correct
36 Correct 2 ms 724 KB Output is correct
37 Correct 2 ms 852 KB Output is correct
38 Correct 2 ms 852 KB Output is correct
39 Correct 2 ms 724 KB Output is correct
40 Correct 2 ms 724 KB Output is correct
41 Correct 2 ms 784 KB Output is correct
42 Correct 2 ms 724 KB Output is correct
43 Correct 2 ms 816 KB Output is correct
44 Correct 2 ms 724 KB Output is correct

Subtask #3
65.0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 456 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 460 KB Output is correct
6 Correct 1 ms 460 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 460 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 464 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 452 KB Output is correct
16 Correct 1 ms 460 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 1 ms 468 KB Output is correct
23 Correct 2 ms 724 KB Output is correct
24 Correct 2 ms 724 KB Output is correct
25 Correct 2 ms 724 KB Output is correct
26 Correct 2 ms 720 KB Output is correct
27 Correct 2 ms 724 KB Output is correct
28 Correct 2 ms 724 KB Output is correct
29 Correct 2 ms 724 KB Output is correct
30 Correct 2 ms 724 KB Output is correct
31 Correct 3 ms 724 KB Output is correct
32 Correct 3 ms 724 KB Output is correct
33 Correct 2 ms 852 KB Output is correct
34 Correct 2 ms 724 KB Output is correct
35 Correct 2 ms 852 KB Output is correct
36 Correct 2 ms 724 KB Output is correct
37 Correct 2 ms 852 KB Output is correct
38 Correct 2 ms 852 KB Output is correct
39 Correct 2 ms 724 KB Output is correct
40 Correct 2 ms 724 KB Output is correct
41 Correct 2 ms 784 KB Output is correct
42 Correct 2 ms 724 KB Output is correct
43 Correct 2 ms 816 KB Output is correct
44 Correct 2 ms 724 KB Output is correct
45 Correct 250 ms 36752 KB Output is correct
46 Correct 248 ms 36088 KB Output is correct
47 Correct 296 ms 36892 KB Output is correct
48 Correct 243 ms 36168 KB Output is correct
49 Correct 247 ms 36096 KB Output is correct
50 Correct 248 ms 35740 KB Output is correct
51 Correct 248 ms 36260 KB Output is correct
52 Correct 246 ms 36996 KB Output is correct
53 Correct 244 ms 36148 KB Output is correct
54 Correct 238 ms 42048 KB Output is correct
55 Correct 243 ms 41960 KB Output is correct
56 Correct 228 ms 41300 KB Output is correct
57 Correct 227 ms 41432 KB Output is correct
58 Correct 186 ms 40868 KB Output is correct
59 Correct 192 ms 41060 KB Output is correct
60 Correct 185 ms 40592 KB Output is correct
61 Correct 212 ms 37080 KB Output is correct
62 Correct 205 ms 41376 KB Output is correct
63 Correct 188 ms 37256 KB Output is correct
64 Correct 193 ms 35984 KB Output is correct
65 Correct 240 ms 40736 KB Output is correct
66 Correct 203 ms 37660 KB Output is correct