oj.uz

Submission #55307

# Submission time Handle Problem Language Result Execution time Memory
55307 2018-07-06T23:11:24 Z ksun48 Cultivation (JOI17_cultivation) C++14
60 / 100
 2000 ms 1660 KB 
#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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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 -