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Submission #1005217

# Submission time Handle Problem Language Result Execution time Memory
1005217 2024-06-22T09:01:08 Z emptypringlescan Tiles (BOI24_tiles) C++17
40 / 100
 73 ms 7756 KB 
#include <bits/stdc++.h>
using namespace std;
int32_t main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	int n,m;
	cin >> n >> m;
	pair<int,int> arr[n];
	for(int i=0; i<n; i++) cin >> arr[i].first >> arr[i].second;
	vector<pair<int,pair<int,int> > > vert;
	for(int i=0; i<n-1; i++){
		if(arr[i].first==arr[i+1].first) vert.push_back({arr[i].first,{arr[i].second,arr[i+1].second}});
	}
	if(arr[0].first==arr[n-1].first) vert.push_back({arr[0].first,{arr[0].second,arr[n-1].second}});
	set<pair<int,int> > odd,even,all;
	set<pair<int,int> >::iterator it;
	sort(vert.begin(),vert.end());
	int ans=0,bad=0;
	for(int o=0; o<(int)vert.size(); o++){
		pair<int,pair<int,int> > i=vert[o];
		pair<int,int> ln=i.second;
		if(ln.second<ln.first) swap(ln.second,ln.first);
		it=all.upper_bound({ln.first,1e9});
		if(it!=all.begin()) it--;
		if(it!=all.end()&&it->first<=ln.first&&it->second>=ln.second){
			pair<int,int> tmp=*it;
			if((it->second-it->first)%2) bad--;
			all.erase(it);
			if(tmp.first<ln.first) all.insert({tmp.first,ln.first});
			if(ln.second<tmp.second) all.insert({ln.second,tmp.second});
			if((ln.first-tmp.first)%2) bad++;
			if((tmp.second-ln.second)%2) bad++;
		}
		else{
			it=all.lower_bound(ln);
			if(it!=all.end()&&it->first==ln.second){
				ln.second=it->second;
				if((it->second-it->first)%2) bad--;
				all.erase(it);
			}
			it=all.lower_bound(ln);
			if(it!=all.begin()) it--;
			if(it!=all.end()&&it->second==ln.first){
				ln.first=it->first;
				if((it->second-it->first)%2) bad--;
				all.erase(it);
			}
			all.insert(ln);
			if((ln.second-ln.first)%2) bad++;
		}
		if(o==(int)vert.size()-1||vert[o+1].first!=vert[o].first){
			if(bad>0){
				cout << ans;
				return 0;
			}
		}
		bool got=false;
		it=odd.lower_bound(ln);
		if(it!=odd.begin()) it--;
		vector<pair<int,int> > die;
		for(;it!=odd.end();it++){
			if(it->second<=ln.first) continue;
			if(it->first>=ln.second) break;
			if(i.first%2==0){
				cout << ans;
				return 0;
			}
			got=true;
			pair<int,int> tmp=*it;
			die.push_back(tmp);
			if(tmp.first<ln.first) odd.insert({tmp.first,ln.first});
			if(tmp.second>ln.second)odd.insert({ln.second,tmp.second});
		}
		for(auto j:die) odd.erase(j);
		die.clear();
		it=even.lower_bound(ln);
		if(it!=even.begin()) it--;
		for(;it!=even.end();it++){
			if(it->second<=ln.first) continue;
			if(it->first>=ln.second) break;
			if(i.first%2==1){
				cout << ans;
				return 0;
			}
			got=true;
			pair<int,int> tmp=*it;
			die.push_back(tmp);
			if(tmp.first<ln.first) even.insert({tmp.first,ln.first});
			if(tmp.second>ln.second)even.insert({ln.second,tmp.second});
		}
		for(auto j:die) even.erase(j);
		die.clear();
		if(!got){
			if(i.first%2==1) odd.insert(ln);
			else even.insert(ln);
		}
		if(i.first%2==1&&even.empty()){
			if(o==(int)vert.size()-1||vert[o+1].first!=vert[o].first) ans=i.first;
			if(o!=(int)vert.size()-1&&vert[o+1].first!=vert[o].first){
				if(vert[o+1].first%2==1) ans=vert[o+1].first;
				else ans=vert[o+1].first-1;
			}
		}
		else if(i.first%2==0&&odd.empty()){
			if(o==(int)vert.size()-1||vert[o+1].first!=vert[o].first) ans=i.first;
			if(o!=(int)vert.size()-1&&vert[o+1].first!=vert[o].first){
				if(vert[o+1].first%2==0) ans=vert[o+1].first;
				else ans=vert[o+1].first-1;
			}
		}
	}
	cout << ans;
	
}
/*18 9
0 2
2 2
2 1
4 1
4 0
9 0
9 2
4 2
4 4
7 4
7 3
9 3
9 6
4 6
4 5
2 5
2 4
0 4
*/

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct

Subtask #2
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Incorrect 1 ms 348 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 6 ms 1052 KB Output is correct
3 Correct 41 ms 3624 KB Output is correct
4 Correct 25 ms 2136 KB Output is correct
5 Correct 20 ms 2132 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 39 ms 3612 KB Output is correct
9 Correct 27 ms 2132 KB Output is correct
10 Correct 34 ms 3676 KB Output is correct
11 Correct 20 ms 1876 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 60 ms 3652 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 24 ms 3540 KB Output is correct
6 Correct 41 ms 3536 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 2 ms 604 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Incorrect 0 ms 348 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 22 ms 2136 KB Output is correct
3 Correct 20 ms 1996 KB Output is correct
4 Correct 24 ms 3540 KB Output is correct
5 Correct 41 ms 3672 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 37 ms 3672 KB Output is correct
9 Correct 34 ms 3532 KB Output is correct
10 Correct 67 ms 3532 KB Output is correct
11 Correct 58 ms 3540 KB Output is correct
12 Incorrect 28 ms 3668 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #6
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 3600 KB Output is correct
2 Correct 30 ms 2136 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 48 ms 3668 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 51 ms 3660 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 61 ms 4524 KB Output is correct
9 Correct 58 ms 3532 KB Output is correct
10 Correct 35 ms 3676 KB Output is correct
11 Correct 29 ms 3528 KB Output is correct
12 Correct 34 ms 3540 KB Output is correct
13 Correct 57 ms 3532 KB Output is correct
14 Correct 59 ms 3528 KB Output is correct
15 Correct 61 ms 3664 KB Output is correct
16 Correct 72 ms 7620 KB Output is correct
17 Correct 73 ms 7752 KB Output is correct
18 Correct 66 ms 7756 KB Output is correct
19 Correct 23 ms 2008 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 41 ms 3432 KB Output is correct
22 Correct 46 ms 2116 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 27 ms 2132 KB Output is correct
37 Correct 66 ms 3536 KB Output is correct
38 Correct 37 ms 3540 KB Output is correct
39 Correct 41 ms 3536 KB Output is correct
40 Correct 49 ms 3536 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 1 ms 348 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 1 ms 348 KB Output is correct
45 Correct 0 ms 348 KB Output is correct
46 Correct 1 ms 348 KB Output is correct

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Incorrect 1 ms 348 KB Output isn't correct
14 Halted 0 ms 0 KB -