답안 #55515 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
55515	2018-07-07T20:31:20 Z	ksun48	Cultivation (JOI17_cultivation)	C++14	80 / 100	593 ms	38652 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;

vector<int> xlist;

int up[400][400];
int down[400][400];
int total[400][400];

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++;
	}
}

int idx(LL a){
	int s = 0;
	int e = xlist.size();
	while(s + 1 < e){
		int m = (s+e) / 2;
		if(a >= xlist[m]){
			s = m;
		} else {
			e = m;
		}
	}
	return s;
}

void tryxfast(int x){
	if(x < 0){
		return;
	}
	vector<int> pos1;
	vector<int> pos2;
	for(int a : xlist){
		pos1.push_back(a - x);
		pos2.push_back(a + 1);
	}
	vector<int> pos(pos1.size() + pos2.size());
	merge(pos1.begin(), pos1.end(), pos2.begin(), pos2.end(), pos.begin());
	if(n > 100 & r > 40) return;

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

	for(int i = 0; i < pos.size(); i++){
		int a = idx((LL)pos[i]+x);
		int b = idx((LL)pos[i]-1);
		// a >= b
		ups.push_back(up[a][b]);
		downs.push_back(down[a][b]);
		totals.push_back(total[a][b]);
	}


	// 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);
	}
}

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({e,s});
	}
	sort(seeds.begin(), seeds.end());
	set<int> xset;
	for(int i = 0; i < n; i++){
		swap(seeds[i].first, seeds[i].second);
		xset.insert(seeds[i].first);
	}
	xlist.push_back(-1);
	for(int x : xset){
		xlist.push_back(x);
	}

	// now n^2 log n
	for(int i = 0; i < xlist.size(); i++){
		vector<int> ins[xlist.size() + 1];
		vector<int> del[xlist.size() + 1];

		for(int k = 0; k < seeds.size(); k++){
			int p = seeds[k].first;
			if(p <= xlist[i]){
				ins[0].push_back(seeds[k].second);
				int jdel = lower_bound(xlist.begin(), xlist.end(), p) - xlist.begin();
				del[jdel].push_back(seeds[k].second);
			}
		}

		multiset<int> grass;
		grass.insert(-1);
		grass.insert(c);
		multiset<int> diffs;
		diffs.insert(-(c+1));
		for(int j = 0; j <= i; j++){
			for(int a : del[j]){
				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[j]){
				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);
			}
			total[i][j] = -*diffs.begin();
			up[i][j] = *(++grass.begin()) - 0;
			down[i][j] = c-1 - *(--(--grass.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:21:6: warning: 'maxqueue::len' will be initialized after [-Wreorder]
  int len;
      ^~~
cultivation.cpp:18:14: warning:   'std::vector<int> maxqueue::elements' [-Wreorder]
  vector<int> elements;
              ^~~~~~~~
cultivation.cpp:22:2: warning:   when initialized here [-Wreorder]
  maxqueue() : s(0), len(0), elements(0), indices(0) {}
  ^~~~~~~~
cultivation.cpp: In function 'void insert(maxqueue*, int)':
cultivation.cpp:26:53: 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:69:7: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
  if(n > 100 & r > 40) return;
     ~~^~~~~
cultivation.cpp:75:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < pos.size(); i++){
                 ~~^~~~~~~~~~~~
cultivation.cpp:90:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < pos.size(); i++){
                 ~~^~~~~~~~~~~~
cultivation.cpp:91:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   while(j < pos.size() && pos[j] <= pos[i] + r - 1){
         ~~^~~~~~~~~~~~
cultivation.cpp: In function 'int main()':
cultivation.cpp:129:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < xlist.size(); i++){
                 ~~^~~~~~~~~~~~~~
cultivation.cpp:133:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int k = 0; k < seeds.size(); k++){
                  ~~^~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	2 ms	376 KB	Output is correct
3	Correct	2 ms	432 KB	Output is correct
4	Correct	2 ms	576 KB	Output is correct
5	Correct	2 ms	576 KB	Output is correct
6	Correct	2 ms	576 KB	Output is correct
7	Correct	3 ms	588 KB	Output is correct
8	Correct	2 ms	632 KB	Output is correct
9	Correct	2 ms	636 KB	Output is correct
10	Correct	2 ms	636 KB	Output is correct
11	Correct	3 ms	636 KB	Output is correct
12	Correct	3 ms	636 KB	Output is correct
13	Correct	3 ms	636 KB	Output is correct
14	Correct	2 ms	636 KB	Output is correct
15	Correct	3 ms	636 KB	Output is correct
16	Correct	3 ms	636 KB	Output is correct

Subtask #2
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	2 ms	376 KB	Output is correct
3	Correct	2 ms	432 KB	Output is correct
4	Correct	2 ms	576 KB	Output is correct
5	Correct	2 ms	576 KB	Output is correct
6	Correct	2 ms	576 KB	Output is correct
7	Correct	3 ms	588 KB	Output is correct
8	Correct	2 ms	632 KB	Output is correct
9	Correct	2 ms	636 KB	Output is correct
10	Correct	2 ms	636 KB	Output is correct
11	Correct	3 ms	636 KB	Output is correct
12	Correct	3 ms	636 KB	Output is correct
13	Correct	3 ms	636 KB	Output is correct
14	Correct	2 ms	636 KB	Output is correct
15	Correct	3 ms	636 KB	Output is correct
16	Correct	3 ms	636 KB	Output is correct
17	Correct	2 ms	708 KB	Output is correct
18	Correct	3 ms	764 KB	Output is correct
19	Correct	4 ms	764 KB	Output is correct
20	Correct	3 ms	764 KB	Output is correct
21	Correct	27 ms	820 KB	Output is correct
22	Correct	7 ms	820 KB	Output is correct
23	Correct	4 ms	820 KB	Output is correct
24	Correct	11 ms	820 KB	Output is correct
25	Correct	9 ms	820 KB	Output is correct
26	Correct	16 ms	892 KB	Output is correct
27	Correct	16 ms	896 KB	Output is correct
28	Correct	12 ms	896 KB	Output is correct
29	Correct	16 ms	900 KB	Output is correct
30	Correct	14 ms	900 KB	Output is correct
31	Correct	16 ms	900 KB	Output is correct
32	Correct	17 ms	900 KB	Output is correct

Subtask #3
15.0 / 15.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	2 ms	376 KB	Output is correct
3	Correct	2 ms	432 KB	Output is correct
4	Correct	2 ms	576 KB	Output is correct
5	Correct	2 ms	576 KB	Output is correct
6	Correct	2 ms	576 KB	Output is correct
7	Correct	3 ms	588 KB	Output is correct
8	Correct	2 ms	632 KB	Output is correct
9	Correct	2 ms	636 KB	Output is correct
10	Correct	2 ms	636 KB	Output is correct
11	Correct	3 ms	636 KB	Output is correct
12	Correct	3 ms	636 KB	Output is correct
13	Correct	3 ms	636 KB	Output is correct
14	Correct	2 ms	636 KB	Output is correct
15	Correct	3 ms	636 KB	Output is correct
16	Correct	3 ms	636 KB	Output is correct
17	Correct	2 ms	708 KB	Output is correct
18	Correct	3 ms	764 KB	Output is correct
19	Correct	4 ms	764 KB	Output is correct
20	Correct	3 ms	764 KB	Output is correct
21	Correct	27 ms	820 KB	Output is correct
22	Correct	7 ms	820 KB	Output is correct
23	Correct	4 ms	820 KB	Output is correct
24	Correct	11 ms	820 KB	Output is correct
25	Correct	9 ms	820 KB	Output is correct
26	Correct	16 ms	892 KB	Output is correct
27	Correct	16 ms	896 KB	Output is correct
28	Correct	12 ms	896 KB	Output is correct
29	Correct	16 ms	900 KB	Output is correct
30	Correct	14 ms	900 KB	Output is correct
31	Correct	16 ms	900 KB	Output is correct
32	Correct	17 ms	900 KB	Output is correct
33	Correct	5 ms	900 KB	Output is correct
34	Correct	12 ms	900 KB	Output is correct
35	Correct	17 ms	900 KB	Output is correct
36	Correct	17 ms	900 KB	Output is correct
37	Correct	16 ms	900 KB	Output is correct
38	Correct	18 ms	900 KB	Output is correct
39	Correct	15 ms	900 KB	Output is correct
40	Correct	16 ms	900 KB	Output is correct
41	Correct	9 ms	900 KB	Output is correct
42	Correct	13 ms	900 KB	Output is correct
43	Correct	16 ms	900 KB	Output is correct
44	Correct	18 ms	900 KB	Output is correct

Subtask #4
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	900 KB	Output is correct
2	Correct	9 ms	1148 KB	Output is correct
3	Correct	10 ms	1148 KB	Output is correct
4	Correct	9 ms	1532 KB	Output is correct
5	Correct	10 ms	1532 KB	Output is correct
6	Correct	8 ms	1532 KB	Output is correct
7	Correct	3 ms	1532 KB	Output is correct
8	Correct	12 ms	1532 KB	Output is correct
9	Correct	6 ms	1532 KB	Output is correct
10	Correct	11 ms	1532 KB	Output is correct
11	Correct	54 ms	1532 KB	Output is correct
12	Correct	9 ms	1532 KB	Output is correct
13	Correct	4 ms	1532 KB	Output is correct
14	Correct	8 ms	1532 KB	Output is correct
15	Correct	4 ms	1532 KB	Output is correct
16	Correct	9 ms	1532 KB	Output is correct
17	Correct	10 ms	1532 KB	Output is correct
18	Correct	6 ms	1532 KB	Output is correct
19	Correct	14 ms	1532 KB	Output is correct
20	Correct	11 ms	1532 KB	Output is correct

Subtask #5
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	900 KB	Output is correct
2	Correct	9 ms	1148 KB	Output is correct
3	Correct	10 ms	1148 KB	Output is correct
4	Correct	9 ms	1532 KB	Output is correct
5	Correct	10 ms	1532 KB	Output is correct
6	Correct	8 ms	1532 KB	Output is correct
7	Correct	3 ms	1532 KB	Output is correct
8	Correct	12 ms	1532 KB	Output is correct
9	Correct	6 ms	1532 KB	Output is correct
10	Correct	11 ms	1532 KB	Output is correct
11	Correct	54 ms	1532 KB	Output is correct
12	Correct	9 ms	1532 KB	Output is correct
13	Correct	4 ms	1532 KB	Output is correct
14	Correct	8 ms	1532 KB	Output is correct
15	Correct	4 ms	1532 KB	Output is correct
16	Correct	9 ms	1532 KB	Output is correct
17	Correct	10 ms	1532 KB	Output is correct
18	Correct	6 ms	1532 KB	Output is correct
19	Correct	14 ms	1532 KB	Output is correct
20	Correct	11 ms	1532 KB	Output is correct
21	Correct	241 ms	7208 KB	Output is correct
22	Correct	378 ms	9900 KB	Output is correct
23	Correct	402 ms	10108 KB	Output is correct
24	Correct	391 ms	10492 KB	Output is correct
25	Correct	593 ms	10492 KB	Output is correct
26	Correct	128 ms	10492 KB	Output is correct
27	Correct	532 ms	34812 KB	Output is correct
28	Correct	392 ms	34812 KB	Output is correct
29	Correct	390 ms	34812 KB	Output is correct
30	Correct	434 ms	34812 KB	Output is correct
31	Correct	436 ms	34812 KB	Output is correct
32	Correct	403 ms	34812 KB	Output is correct
33	Correct	547 ms	38652 KB	Output is correct
34	Correct	442 ms	38652 KB	Output is correct
35	Correct	422 ms	38652 KB	Output is correct
36	Correct	423 ms	38652 KB	Output is correct

Subtask #6
0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	2 ms	376 KB	Output is correct
3	Correct	2 ms	432 KB	Output is correct
4	Correct	2 ms	576 KB	Output is correct
5	Correct	2 ms	576 KB	Output is correct
6	Correct	2 ms	576 KB	Output is correct
7	Correct	3 ms	588 KB	Output is correct
8	Correct	2 ms	632 KB	Output is correct
9	Correct	2 ms	636 KB	Output is correct
10	Correct	2 ms	636 KB	Output is correct
11	Correct	3 ms	636 KB	Output is correct
12	Correct	3 ms	636 KB	Output is correct
13	Correct	3 ms	636 KB	Output is correct
14	Correct	2 ms	636 KB	Output is correct
15	Correct	3 ms	636 KB	Output is correct
16	Correct	3 ms	636 KB	Output is correct
17	Correct	2 ms	708 KB	Output is correct
18	Correct	3 ms	764 KB	Output is correct
19	Correct	4 ms	764 KB	Output is correct
20	Correct	3 ms	764 KB	Output is correct
21	Correct	27 ms	820 KB	Output is correct
22	Correct	7 ms	820 KB	Output is correct
23	Correct	4 ms	820 KB	Output is correct
24	Correct	11 ms	820 KB	Output is correct
25	Correct	9 ms	820 KB	Output is correct
26	Correct	16 ms	892 KB	Output is correct
27	Correct	16 ms	896 KB	Output is correct
28	Correct	12 ms	896 KB	Output is correct
29	Correct	16 ms	900 KB	Output is correct
30	Correct	14 ms	900 KB	Output is correct
31	Correct	16 ms	900 KB	Output is correct
32	Correct	17 ms	900 KB	Output is correct
33	Correct	5 ms	900 KB	Output is correct
34	Correct	12 ms	900 KB	Output is correct
35	Correct	17 ms	900 KB	Output is correct
36	Correct	17 ms	900 KB	Output is correct
37	Correct	16 ms	900 KB	Output is correct
38	Correct	18 ms	900 KB	Output is correct
39	Correct	15 ms	900 KB	Output is correct
40	Correct	16 ms	900 KB	Output is correct
41	Correct	9 ms	900 KB	Output is correct
42	Correct	13 ms	900 KB	Output is correct
43	Correct	16 ms	900 KB	Output is correct
44	Correct	18 ms	900 KB	Output is correct
45	Correct	5 ms	900 KB	Output is correct
46	Correct	9 ms	1148 KB	Output is correct
47	Correct	10 ms	1148 KB	Output is correct
48	Correct	9 ms	1532 KB	Output is correct
49	Correct	10 ms	1532 KB	Output is correct
50	Correct	8 ms	1532 KB	Output is correct
51	Correct	3 ms	1532 KB	Output is correct
52	Correct	12 ms	1532 KB	Output is correct
53	Correct	6 ms	1532 KB	Output is correct
54	Correct	11 ms	1532 KB	Output is correct
55	Correct	54 ms	1532 KB	Output is correct
56	Correct	9 ms	1532 KB	Output is correct
57	Correct	4 ms	1532 KB	Output is correct
58	Correct	8 ms	1532 KB	Output is correct
59	Correct	4 ms	1532 KB	Output is correct
60	Correct	9 ms	1532 KB	Output is correct
61	Correct	10 ms	1532 KB	Output is correct
62	Correct	6 ms	1532 KB	Output is correct
63	Correct	14 ms	1532 KB	Output is correct
64	Correct	11 ms	1532 KB	Output is correct
65	Correct	241 ms	7208 KB	Output is correct
66	Correct	378 ms	9900 KB	Output is correct
67	Correct	402 ms	10108 KB	Output is correct
68	Correct	391 ms	10492 KB	Output is correct
69	Correct	593 ms	10492 KB	Output is correct
70	Correct	128 ms	10492 KB	Output is correct
71	Correct	532 ms	34812 KB	Output is correct
72	Correct	392 ms	34812 KB	Output is correct
73	Correct	390 ms	34812 KB	Output is correct
74	Correct	434 ms	34812 KB	Output is correct
75	Correct	436 ms	34812 KB	Output is correct
76	Correct	403 ms	34812 KB	Output is correct
77	Correct	547 ms	38652 KB	Output is correct
78	Correct	442 ms	38652 KB	Output is correct
79	Correct	422 ms	38652 KB	Output is correct
80	Correct	423 ms	38652 KB	Output is correct
81	Incorrect	423 ms	38652 KB	Output isn't correct
82	Halted	0 ms	0 KB	-

답안 #55515

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 20.0 / 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
20.0 / 20.0

Subtask #6
0 / 20.0