답안 #55307 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
55307	2018-07-06T23:11:24 Z	ksun48	Cultivation (JOI17_cultivation)	C++14	60 / 100	2000 ms	1660 KB

cultivation

#include <bits/stdc++.h>
using namespace std;
typedef long long LL;

int r, c, n;
vector<pair<int,int> > seeds;
const int INF = 2100100100;
int best = INF;
set<int> tried;

struct maxqueue {
	vector<int> elements;
	vector<int> indices;
	int s;
	int len;
	maxqueue() : s(0), len(0), elements(0), indices(0) {}
};

void insert(maxqueue* m, int f){
	while(m->elements.size() > 0 && m->elements.size() > m->s && m->elements[m->elements.size()-1] <= f){
		m->elements.pop_back();
		m->indices.pop_back();
	}
	m->elements.push_back(f);
	m->indices.push_back(m->len);
	m->len++;
}
int get(maxqueue* m){
	return m->elements[m->s];
}
void pop(maxqueue *m, int idx){
	if(m->indices[m->s] == idx){
		m->s++;
	}
}

void tryxfast(int x){
	if(x < 0){
		return;
	}
	set<int> times;
	for(pair<int,int> z : seeds){
		times.insert(z.first - x);
		times.insert(z.first + 1);
	}
	vector<int> pos;
	map<int,int> idx;
	for(int t : times){
		idx[t] = pos.size();
		pos.push_back(t);
	}
	vector<int> ins[pos.size()];
	vector<int> del[pos.size()];
	for(pair<int,int> z : seeds){
		ins[idx[z.first - x]].push_back(z.second); // ins
		del[idx[z.first + 1]].push_back(z.second); // del
	}

	vector<int> ups;
	vector<int> downs;
	vector<int> totals;

	multiset<int> grass;
	grass.insert(-1);
	grass.insert(c);
	multiset<int> diffs;
	diffs.insert(-(c+1));
	for(int i = 0; i < pos.size(); i++){
		for(int a : del[i]){
			int a1 = *(--grass.find(a));
			int a2 = *(++grass.find(a));
			diffs.erase(diffs.find(a1-a));
			diffs.erase(diffs.find(a-a2));
			diffs.insert(a1-a2);
			grass.erase(grass.find(a));
		}
		for(int a : ins[i]){
			grass.insert(a);
			int a1 = *(--grass.find(a));
			int a2 = *(++grass.find(a));
			diffs.erase(diffs.find(a1-a2));
			diffs.insert(a1-a);
			diffs.insert(a-a2);
		}
		totals.push_back( -*diffs.begin() );
		ups.push_back( *(++grass.begin()) - 0 );
		downs.push_back( c-1 - *(--(--grass.end())) );
	}
	// two pointers: 
	int j = 0;
	maxqueue* upset    = new maxqueue();
	maxqueue* downset  = new maxqueue();
	maxqueue* totalset = new maxqueue();
	for(int i = 0; i < pos.size(); i++){
		while(j < pos.size() && pos[j] <= pos[i] + r - 1){
			insert(upset, ups[j]);
			insert(downset, downs[j]);
			insert(totalset, totals[j]);
			j++;
		}
		int total = get(totalset);
		if(total < c+1){
			LL need = max((LL)get(upset) + (LL)get(downset), (LL)total - 1);
			best = (int)min((LL)best, need + x);
		}
		pop(upset, i);
		pop(downset, i);
		pop(totalset, i);
	}
	delete upset;
	delete downset;
	delete totalset;
}
int main(){
	cin.sync_with_stdio(0); cin.tie(0);
	cin >> r >> c >> n;
	for(int i = 0; i < n; i++){
		int s, e;
		cin >> s >> e;
		s--; e--;
		seeds.push_back({s,e});
	}
	sort(seeds.begin(), seeds.end());
	set<int> trying;
	for(int i = 0; i < n; i++){
		for(int j = 0; j < n; j++){
			trying.insert(seeds[i].first + r-1 - seeds[j].first);
			trying.insert(seeds[i].first -   1 - seeds[j].first);
		}
	}
	for(int r : trying){
		tryxfast(r);
	}
	cout << best << '\n';
}

Compilation message

cultivation.cpp: In constructor 'maxqueue::maxqueue()':
cultivation.cpp:15:6: warning: 'maxqueue::len' will be initialized after [-Wreorder]
  int len;
      ^~~
cultivation.cpp:12:14: warning:   'std::vector<int> maxqueue::elements' [-Wreorder]
  vector<int> elements;
              ^~~~~~~~
cultivation.cpp:16:2: warning:   when initialized here [-Wreorder]
  maxqueue() : s(0), len(0), elements(0), indices(0) {}
  ^~~~~~~~
cultivation.cpp: In function 'void insert(maxqueue*, int)':
cultivation.cpp:20:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  while(m->elements.size() > 0 && m->elements.size() > m->s && m->elements[m->elements.size()-1] <= f){
                                  ~~~~~~~~~~~~~~~~~~~^~~~~~
cultivation.cpp: In function 'void tryxfast(int)':
cultivation.cpp:68:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < pos.size(); i++){
                 ~~^~~~~~~~~~~~
cultivation.cpp:94:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < pos.size(); i++){
                 ~~^~~~~~~~~~~~
cultivation.cpp:95:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   while(j < pos.size() && pos[j] <= pos[i] + r - 1){
         ~~^~~~~~~~~~~~

Subtask #1
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	252 KB	Output is correct
2	Correct	2 ms	356 KB	Output is correct
3	Correct	2 ms	520 KB	Output is correct
4	Correct	2 ms	520 KB	Output is correct
5	Correct	2 ms	520 KB	Output is correct
6	Correct	2 ms	520 KB	Output is correct
7	Correct	2 ms	700 KB	Output is correct
8	Correct	3 ms	700 KB	Output is correct
9	Correct	3 ms	700 KB	Output is correct
10	Correct	2 ms	724 KB	Output is correct
11	Correct	2 ms	724 KB	Output is correct
12	Correct	2 ms	724 KB	Output is correct
13	Correct	3 ms	728 KB	Output is correct
14	Correct	2 ms	728 KB	Output is correct
15	Correct	3 ms	728 KB	Output is correct
16	Correct	2 ms	728 KB	Output is correct

Subtask #2
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	252 KB	Output is correct
2	Correct	2 ms	356 KB	Output is correct
3	Correct	2 ms	520 KB	Output is correct
4	Correct	2 ms	520 KB	Output is correct
5	Correct	2 ms	520 KB	Output is correct
6	Correct	2 ms	520 KB	Output is correct
7	Correct	2 ms	700 KB	Output is correct
8	Correct	3 ms	700 KB	Output is correct
9	Correct	3 ms	700 KB	Output is correct
10	Correct	2 ms	724 KB	Output is correct
11	Correct	2 ms	724 KB	Output is correct
12	Correct	2 ms	724 KB	Output is correct
13	Correct	3 ms	728 KB	Output is correct
14	Correct	2 ms	728 KB	Output is correct
15	Correct	3 ms	728 KB	Output is correct
16	Correct	2 ms	728 KB	Output is correct
17	Correct	3 ms	728 KB	Output is correct
18	Correct	7 ms	728 KB	Output is correct
19	Correct	5 ms	728 KB	Output is correct
20	Correct	3 ms	728 KB	Output is correct
21	Correct	7 ms	728 KB	Output is correct
22	Correct	17 ms	728 KB	Output is correct
23	Correct	4 ms	728 KB	Output is correct
24	Correct	23 ms	728 KB	Output is correct
25	Correct	21 ms	728 KB	Output is correct
26	Correct	34 ms	740 KB	Output is correct
27	Correct	34 ms	740 KB	Output is correct
28	Correct	25 ms	740 KB	Output is correct
29	Correct	36 ms	740 KB	Output is correct
30	Correct	35 ms	748 KB	Output is correct
31	Correct	35 ms	748 KB	Output is correct
32	Correct	34 ms	748 KB	Output is correct

Subtask #3
15.0 / 15.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	252 KB	Output is correct
2	Correct	2 ms	356 KB	Output is correct
3	Correct	2 ms	520 KB	Output is correct
4	Correct	2 ms	520 KB	Output is correct
5	Correct	2 ms	520 KB	Output is correct
6	Correct	2 ms	520 KB	Output is correct
7	Correct	2 ms	700 KB	Output is correct
8	Correct	3 ms	700 KB	Output is correct
9	Correct	3 ms	700 KB	Output is correct
10	Correct	2 ms	724 KB	Output is correct
11	Correct	2 ms	724 KB	Output is correct
12	Correct	2 ms	724 KB	Output is correct
13	Correct	3 ms	728 KB	Output is correct
14	Correct	2 ms	728 KB	Output is correct
15	Correct	3 ms	728 KB	Output is correct
16	Correct	2 ms	728 KB	Output is correct
17	Correct	3 ms	728 KB	Output is correct
18	Correct	7 ms	728 KB	Output is correct
19	Correct	5 ms	728 KB	Output is correct
20	Correct	3 ms	728 KB	Output is correct
21	Correct	7 ms	728 KB	Output is correct
22	Correct	17 ms	728 KB	Output is correct
23	Correct	4 ms	728 KB	Output is correct
24	Correct	23 ms	728 KB	Output is correct
25	Correct	21 ms	728 KB	Output is correct
26	Correct	34 ms	740 KB	Output is correct
27	Correct	34 ms	740 KB	Output is correct
28	Correct	25 ms	740 KB	Output is correct
29	Correct	36 ms	740 KB	Output is correct
30	Correct	35 ms	748 KB	Output is correct
31	Correct	35 ms	748 KB	Output is correct
32	Correct	34 ms	748 KB	Output is correct
33	Correct	5 ms	748 KB	Output is correct
34	Correct	25 ms	748 KB	Output is correct
35	Correct	48 ms	748 KB	Output is correct
36	Correct	40 ms	748 KB	Output is correct
37	Correct	38 ms	748 KB	Output is correct
38	Correct	41 ms	748 KB	Output is correct
39	Correct	40 ms	892 KB	Output is correct
40	Correct	39 ms	892 KB	Output is correct
41	Correct	28 ms	892 KB	Output is correct
42	Correct	31 ms	892 KB	Output is correct
43	Correct	39 ms	892 KB	Output is correct
44	Correct	37 ms	892 KB	Output is correct

Subtask #4
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	11 ms	892 KB	Output is correct
2	Correct	24 ms	892 KB	Output is correct
3	Correct	31 ms	892 KB	Output is correct
4	Correct	28 ms	892 KB	Output is correct
5	Correct	27 ms	892 KB	Output is correct
6	Correct	13 ms	892 KB	Output is correct
7	Correct	3 ms	892 KB	Output is correct
8	Correct	26 ms	892 KB	Output is correct
9	Correct	15 ms	892 KB	Output is correct
10	Correct	31 ms	892 KB	Output is correct
11	Correct	41 ms	892 KB	Output is correct
12	Correct	35 ms	892 KB	Output is correct
13	Correct	7 ms	892 KB	Output is correct
14	Correct	13 ms	892 KB	Output is correct
15	Correct	8 ms	892 KB	Output is correct
16	Correct	25 ms	892 KB	Output is correct
17	Correct	28 ms	892 KB	Output is correct
18	Correct	14 ms	892 KB	Output is correct
19	Correct	28 ms	892 KB	Output is correct
20	Correct	37 ms	892 KB	Output is correct

Subtask #5
0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	11 ms	892 KB	Output is correct
2	Correct	24 ms	892 KB	Output is correct
3	Correct	31 ms	892 KB	Output is correct
4	Correct	28 ms	892 KB	Output is correct
5	Correct	27 ms	892 KB	Output is correct
6	Correct	13 ms	892 KB	Output is correct
7	Correct	3 ms	892 KB	Output is correct
8	Correct	26 ms	892 KB	Output is correct
9	Correct	15 ms	892 KB	Output is correct
10	Correct	31 ms	892 KB	Output is correct
11	Correct	41 ms	892 KB	Output is correct
12	Correct	35 ms	892 KB	Output is correct
13	Correct	7 ms	892 KB	Output is correct
14	Correct	13 ms	892 KB	Output is correct
15	Correct	8 ms	892 KB	Output is correct
16	Correct	25 ms	892 KB	Output is correct
17	Correct	28 ms	892 KB	Output is correct
18	Correct	14 ms	892 KB	Output is correct
19	Correct	28 ms	892 KB	Output is correct
20	Correct	37 ms	892 KB	Output is correct
21	Correct	1736 ms	1268 KB	Output is correct
22	Execution timed out	2073 ms	1660 KB	Time limit exceeded
23	Halted	0 ms	0 KB	-

Subtask #6
0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	252 KB	Output is correct
2	Correct	2 ms	356 KB	Output is correct
3	Correct	2 ms	520 KB	Output is correct
4	Correct	2 ms	520 KB	Output is correct
5	Correct	2 ms	520 KB	Output is correct
6	Correct	2 ms	520 KB	Output is correct
7	Correct	2 ms	700 KB	Output is correct
8	Correct	3 ms	700 KB	Output is correct
9	Correct	3 ms	700 KB	Output is correct
10	Correct	2 ms	724 KB	Output is correct
11	Correct	2 ms	724 KB	Output is correct
12	Correct	2 ms	724 KB	Output is correct
13	Correct	3 ms	728 KB	Output is correct
14	Correct	2 ms	728 KB	Output is correct
15	Correct	3 ms	728 KB	Output is correct
16	Correct	2 ms	728 KB	Output is correct
17	Correct	3 ms	728 KB	Output is correct
18	Correct	7 ms	728 KB	Output is correct
19	Correct	5 ms	728 KB	Output is correct
20	Correct	3 ms	728 KB	Output is correct
21	Correct	7 ms	728 KB	Output is correct
22	Correct	17 ms	728 KB	Output is correct
23	Correct	4 ms	728 KB	Output is correct
24	Correct	23 ms	728 KB	Output is correct
25	Correct	21 ms	728 KB	Output is correct
26	Correct	34 ms	740 KB	Output is correct
27	Correct	34 ms	740 KB	Output is correct
28	Correct	25 ms	740 KB	Output is correct
29	Correct	36 ms	740 KB	Output is correct
30	Correct	35 ms	748 KB	Output is correct
31	Correct	35 ms	748 KB	Output is correct
32	Correct	34 ms	748 KB	Output is correct
33	Correct	5 ms	748 KB	Output is correct
34	Correct	25 ms	748 KB	Output is correct
35	Correct	48 ms	748 KB	Output is correct
36	Correct	40 ms	748 KB	Output is correct
37	Correct	38 ms	748 KB	Output is correct
38	Correct	41 ms	748 KB	Output is correct
39	Correct	40 ms	892 KB	Output is correct
40	Correct	39 ms	892 KB	Output is correct
41	Correct	28 ms	892 KB	Output is correct
42	Correct	31 ms	892 KB	Output is correct
43	Correct	39 ms	892 KB	Output is correct
44	Correct	37 ms	892 KB	Output is correct
45	Correct	11 ms	892 KB	Output is correct
46	Correct	24 ms	892 KB	Output is correct
47	Correct	31 ms	892 KB	Output is correct
48	Correct	28 ms	892 KB	Output is correct
49	Correct	27 ms	892 KB	Output is correct
50	Correct	13 ms	892 KB	Output is correct
51	Correct	3 ms	892 KB	Output is correct
52	Correct	26 ms	892 KB	Output is correct
53	Correct	15 ms	892 KB	Output is correct
54	Correct	31 ms	892 KB	Output is correct
55	Correct	41 ms	892 KB	Output is correct
56	Correct	35 ms	892 KB	Output is correct
57	Correct	7 ms	892 KB	Output is correct
58	Correct	13 ms	892 KB	Output is correct
59	Correct	8 ms	892 KB	Output is correct
60	Correct	25 ms	892 KB	Output is correct
61	Correct	28 ms	892 KB	Output is correct
62	Correct	14 ms	892 KB	Output is correct
63	Correct	28 ms	892 KB	Output is correct
64	Correct	37 ms	892 KB	Output is correct
65	Correct	1736 ms	1268 KB	Output is correct
66	Execution timed out	2073 ms	1660 KB	Time limit exceeded
67	Halted	0 ms	0 KB	-

답안 #55307

Compilation message

Subtask #1 5.0 / 5.0

Subtask #2 10.0 / 10.0

Subtask #3 15.0 / 15.0

Subtask #4 30.0 / 30.0

Subtask #5 0 / 20.0

Subtask #6 0 / 20.0

Subtask #1
5.0 / 5.0

Subtask #2
10.0 / 10.0

Subtask #3
15.0 / 15.0

Subtask #4
30.0 / 30.0

Subtask #5
0 / 20.0

Subtask #6
0 / 20.0