답안 #605942

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
605942	2022-07-26T04:29:08 Z	GusterGoose27	Fireworks (APIO16_fireworks)	C++11	100 / 100	337 ms	80328 KB

fireworks

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll, ll> pii;

class hull {
public:
	ll init_val = 0;
	ll init_slope = 0;
	multiset<ll> changes;
	hull() {}
	void prune(ll length) {
		init_val += length;
		if (changes.empty()) {
			changes.insert(length);
			changes.insert(length);
			init_slope = -1;
			return;
		}
		while (changes.size() > -init_slope+1) changes.erase(changes.find(*changes.rbegin()));
		auto it = changes.rbegin();
		ll b2 = *it;
		changes.erase(changes.find(*it));
		it = changes.rbegin();
		ll b1 = *it;
		changes.erase(changes.find(*it));
		changes.insert(b1+length);
		changes.insert(b2+length);
	}
	void merge(hull *other) {
		init_val += other->init_val;
		init_slope += other->init_slope;
		for (ll v: other->changes) changes.insert(v);
		delete other;
	}
	ll size() {
		return changes.size();
	}
};

const ll MAXN = 3e5;
ll n, m;
vector<pii> edges[MAXN];
hull *hulls[MAXN];

void dfs(ll cur = 0) {
	hulls[cur] = new hull();
	for (pii e: edges[cur]) {
		ll next = e.first;
		dfs(next);
		hulls[next]->prune(e.second);
		if (hulls[cur]->size() > hulls[next]->size()) hulls[cur]->merge(hulls[next]);
		else {
			hulls[next]->merge(hulls[cur]);
			hulls[cur] = hulls[next];
		}
	}
}

int main() {
	ios_base::sync_with_stdio(false); cin.tie(NULL);
	cin >> n >> m;
	for (ll i = 1; i < n+m; i++) {
		ll p, w;
		cin >> p >> w; p--;
		edges[p].push_back(pii(i, w));
	}
	dfs();
	hull *h = hulls[0];
	ll v = h->init_val;
	ll slope = h->init_slope;
	ll prev = 0;
	for (ll change: h->changes) {
		v += slope*(change-prev);
		slope++;
		if (slope == 0) break;
		prev = change;
	}
	cout << v << "\n";
}

Compilation message

fireworks.cpp: In member function 'void hull::prune(ll)':
fireworks.cpp:22:25: warning: comparison of integer expressions of different signedness: 'std::multiset<long long int>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   22 |   while (changes.size() > -init_slope+1) changes.erase(changes.find(*changes.rbegin()));
      |          ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	7252 KB	Output is correct
2	Correct	4 ms	7252 KB	Output is correct
3	Correct	5 ms	7252 KB	Output is correct
4	Correct	4 ms	7380 KB	Output is correct
5	Correct	4 ms	7380 KB	Output is correct
6	Correct	4 ms	7252 KB	Output is correct
7	Correct	6 ms	7252 KB	Output is correct
8	Correct	5 ms	7380 KB	Output is correct
9	Correct	4 ms	7380 KB	Output is correct
10	Correct	4 ms	7380 KB	Output is correct

Subtask #2
19.0 / 19.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	7252 KB	Output is correct
2	Correct	4 ms	7372 KB	Output is correct
3	Correct	4 ms	7252 KB	Output is correct
4	Correct	4 ms	7380 KB	Output is correct
5	Correct	4 ms	7252 KB	Output is correct
6	Correct	4 ms	7252 KB	Output is correct
7	Correct	4 ms	7252 KB	Output is correct
8	Correct	5 ms	7252 KB	Output is correct
9	Correct	4 ms	7252 KB	Output is correct
10	Correct	4 ms	7380 KB	Output is correct
11	Correct	5 ms	7380 KB	Output is correct
12	Correct	5 ms	7380 KB	Output is correct
13	Correct	5 ms	7380 KB	Output is correct
14	Correct	6 ms	7380 KB	Output is correct
15	Correct	4 ms	7380 KB	Output is correct
16	Correct	4 ms	7380 KB	Output is correct
17	Correct	4 ms	7380 KB	Output is correct
18	Correct	4 ms	7380 KB	Output is correct
19	Correct	6 ms	7380 KB	Output is correct

Subtask #3
29.0 / 29.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	7252 KB	Output is correct
2	Correct	4 ms	7252 KB	Output is correct
3	Correct	5 ms	7252 KB	Output is correct
4	Correct	4 ms	7380 KB	Output is correct
5	Correct	4 ms	7380 KB	Output is correct
6	Correct	4 ms	7252 KB	Output is correct
7	Correct	6 ms	7252 KB	Output is correct
8	Correct	5 ms	7380 KB	Output is correct
9	Correct	4 ms	7380 KB	Output is correct
10	Correct	4 ms	7380 KB	Output is correct
11	Correct	5 ms	7252 KB	Output is correct
12	Correct	4 ms	7372 KB	Output is correct
13	Correct	4 ms	7252 KB	Output is correct
14	Correct	4 ms	7380 KB	Output is correct
15	Correct	4 ms	7252 KB	Output is correct
16	Correct	4 ms	7252 KB	Output is correct
17	Correct	4 ms	7252 KB	Output is correct
18	Correct	5 ms	7252 KB	Output is correct
19	Correct	4 ms	7252 KB	Output is correct
20	Correct	4 ms	7380 KB	Output is correct
21	Correct	5 ms	7380 KB	Output is correct
22	Correct	5 ms	7380 KB	Output is correct
23	Correct	5 ms	7380 KB	Output is correct
24	Correct	6 ms	7380 KB	Output is correct
25	Correct	4 ms	7380 KB	Output is correct
26	Correct	4 ms	7380 KB	Output is correct
27	Correct	4 ms	7380 KB	Output is correct
28	Correct	4 ms	7380 KB	Output is correct
29	Correct	6 ms	7380 KB	Output is correct
30	Correct	4 ms	7380 KB	Output is correct
31	Correct	5 ms	7380 KB	Output is correct
32	Correct	5 ms	7384 KB	Output is correct
33	Correct	5 ms	7512 KB	Output is correct
34	Correct	5 ms	7512 KB	Output is correct
35	Correct	6 ms	7636 KB	Output is correct
36	Correct	7 ms	7616 KB	Output is correct
37	Correct	7 ms	7672 KB	Output is correct
38	Correct	7 ms	7636 KB	Output is correct
39	Correct	8 ms	7636 KB	Output is correct
40	Correct	7 ms	8528 KB	Output is correct
41	Correct	8 ms	8532 KB	Output is correct
42	Correct	6 ms	7636 KB	Output is correct
43	Correct	7 ms	8020 KB	Output is correct
44	Correct	7 ms	8020 KB	Output is correct
45	Correct	7 ms	8020 KB	Output is correct
46	Correct	7 ms	7796 KB	Output is correct
47	Correct	9 ms	7780 KB	Output is correct
48	Correct	7 ms	7764 KB	Output is correct
49	Correct	9 ms	7772 KB	Output is correct
50	Correct	6 ms	7764 KB	Output is correct
51	Correct	7 ms	7768 KB	Output is correct
52	Correct	6 ms	7764 KB	Output is correct
53	Correct	7 ms	7764 KB	Output is correct
54	Correct	7 ms	7976 KB	Output is correct

Subtask #4
45.0 / 45.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	7252 KB	Output is correct
2	Correct	4 ms	7252 KB	Output is correct
3	Correct	5 ms	7252 KB	Output is correct
4	Correct	4 ms	7380 KB	Output is correct
5	Correct	4 ms	7380 KB	Output is correct
6	Correct	4 ms	7252 KB	Output is correct
7	Correct	6 ms	7252 KB	Output is correct
8	Correct	5 ms	7380 KB	Output is correct
9	Correct	4 ms	7380 KB	Output is correct
10	Correct	4 ms	7380 KB	Output is correct
11	Correct	5 ms	7252 KB	Output is correct
12	Correct	4 ms	7372 KB	Output is correct
13	Correct	4 ms	7252 KB	Output is correct
14	Correct	4 ms	7380 KB	Output is correct
15	Correct	4 ms	7252 KB	Output is correct
16	Correct	4 ms	7252 KB	Output is correct
17	Correct	4 ms	7252 KB	Output is correct
18	Correct	5 ms	7252 KB	Output is correct
19	Correct	4 ms	7252 KB	Output is correct
20	Correct	4 ms	7380 KB	Output is correct
21	Correct	5 ms	7380 KB	Output is correct
22	Correct	5 ms	7380 KB	Output is correct
23	Correct	5 ms	7380 KB	Output is correct
24	Correct	6 ms	7380 KB	Output is correct
25	Correct	4 ms	7380 KB	Output is correct
26	Correct	4 ms	7380 KB	Output is correct
27	Correct	4 ms	7380 KB	Output is correct
28	Correct	4 ms	7380 KB	Output is correct
29	Correct	6 ms	7380 KB	Output is correct
30	Correct	4 ms	7380 KB	Output is correct
31	Correct	5 ms	7380 KB	Output is correct
32	Correct	5 ms	7384 KB	Output is correct
33	Correct	5 ms	7512 KB	Output is correct
34	Correct	5 ms	7512 KB	Output is correct
35	Correct	6 ms	7636 KB	Output is correct
36	Correct	7 ms	7616 KB	Output is correct
37	Correct	7 ms	7672 KB	Output is correct
38	Correct	7 ms	7636 KB	Output is correct
39	Correct	8 ms	7636 KB	Output is correct
40	Correct	7 ms	8528 KB	Output is correct
41	Correct	8 ms	8532 KB	Output is correct
42	Correct	6 ms	7636 KB	Output is correct
43	Correct	7 ms	8020 KB	Output is correct
44	Correct	7 ms	8020 KB	Output is correct
45	Correct	7 ms	8020 KB	Output is correct
46	Correct	7 ms	7796 KB	Output is correct
47	Correct	9 ms	7780 KB	Output is correct
48	Correct	7 ms	7764 KB	Output is correct
49	Correct	9 ms	7772 KB	Output is correct
50	Correct	6 ms	7764 KB	Output is correct
51	Correct	7 ms	7768 KB	Output is correct
52	Correct	6 ms	7764 KB	Output is correct
53	Correct	7 ms	7764 KB	Output is correct
54	Correct	7 ms	7976 KB	Output is correct
55	Correct	12 ms	8264 KB	Output is correct
56	Correct	38 ms	10700 KB	Output is correct
57	Correct	67 ms	13180 KB	Output is correct
58	Correct	80 ms	14944 KB	Output is correct
59	Correct	114 ms	17708 KB	Output is correct
60	Correct	173 ms	19760 KB	Output is correct
61	Correct	181 ms	21792 KB	Output is correct
62	Correct	178 ms	23952 KB	Output is correct
63	Correct	225 ms	26736 KB	Output is correct
64	Correct	265 ms	27104 KB	Output is correct
65	Correct	146 ms	80232 KB	Output is correct
66	Correct	135 ms	80328 KB	Output is correct
67	Correct	123 ms	24056 KB	Output is correct
68	Correct	257 ms	49700 KB	Output is correct
69	Correct	253 ms	45688 KB	Output is correct
70	Correct	235 ms	45612 KB	Output is correct
71	Correct	285 ms	34932 KB	Output is correct
72	Correct	285 ms	35116 KB	Output is correct
73	Correct	281 ms	33708 KB	Output is correct
74	Correct	259 ms	33848 KB	Output is correct
75	Correct	276 ms	33016 KB	Output is correct
76	Correct	278 ms	33016 KB	Output is correct
77	Correct	312 ms	32792 KB	Output is correct
78	Correct	297 ms	33308 KB	Output is correct
79	Correct	337 ms	46156 KB	Output is correct

답안 #605942

Compilation message

Subtask #1 7.0 / 7.0

Subtask #2 19.0 / 19.0

Subtask #3 29.0 / 29.0

Subtask #4 45.0 / 45.0

Subtask #1
7.0 / 7.0

Subtask #2
19.0 / 19.0

Subtask #3
29.0 / 29.0

Subtask #4
45.0 / 45.0