oj.uz

Submission #853393

# Submission time Handle Problem Language Result Execution time Memory
853393 2023-09-24T09:23:42 Z willychan Dango Maker (JOI18_dango_maker) C++14
33 / 100
 445 ms 234648 KB 
#include<bits/stdc++.h>
using namespace std;
typedef int ll;
//#include<bits/extc++.h>
//__gnu_pbds
const int MAXN = 3e6; 
struct edge{
	int to;
	ll cap;
	int rev;
};
vector<edge> side[MAXN];
int level[MAXN];
int nxt[MAXN];
struct DINIC{
	int n;
	void init(int s){
		n = s;
		for(int i=0;i<n;i++) side[i].clear();
	}
	
	void add_edge(int a,int b,ll c){
//		cout<<a<<"->"<<b<<"\n";
		side[a].push_back({b,c,(int)(side[b].size())});
		side[b].push_back({a,0,(int)(side[a].size()-1)});
	}
	
	bool bfs(int s,int t){
		fill(level,level+n,-1);
		queue<int> q;
		level[s]=0;
		q.push(s);
		while(q.size()){
			int cur = q.front();
			q.pop();
			for(auto e : side[cur]){
				if(e.cap<=0) continue;
				if(level[e.to]<0){
					level[e.to] = level[cur]+1;
					q.push(e.to);
				}
			}
		}
		return (level[t]!=-1);
	}
	
	ll dfs(int v,int t,ll flow){
		if(v==t) return flow;	
		for(;nxt[v]<side[v].size();nxt[v]++){
			auto& e = side[v][nxt[v]];
			if(e.cap<=0 || level[v]+1!=level[e.to]) continue;	
			ll ans = dfs(e.to,t,min(flow,e.cap));
			if(ans>0){
				e.cap-=ans;
				side[e.to][e.rev].cap+=ans;
				return ans;
			}
		}
		return 0;
	}
	 
 
	ll flow(int s,int t){
		ll ans= 0;
		while(bfs(s,t)){
			fill(nxt,nxt+n,0);
			ll f = 0;
			while((f=dfs(s,t,1e9))>0){
				ans+=f;
			}
		}
		return ans;
	}
} graph;
 
 
 
int main(){
	ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
	int n,m;cin>>n>>m;	
	vector<vector<char>> grid(n,vector<char>(m));
	vector<vector<int> > taken(n,vector<int>(m,0));
	for(int i=0;i<n;i++){
		string s;cin>>s;	
		for(int j=0;j<m;j++){
			grid[i][j] = s[j];
		}
	}
	int cnt = 0;
	for(int i=0;i<n;i++){
		for(int j=0;j+2<m;j++){
			if(grid[i][j]=='R' && grid[i][j+1]=='G' && grid[i][j+2]=='W'){
				cnt++;
				taken[i][j]=cnt;
				taken[i][j+1]=cnt;
				taken[i][j+2]=cnt;
			}
		}
	}
	//cout<<cnt<<" ";
	int total = cnt;
	for(int j=0;j<m;j++){
		for(int i=0;i+2<n;i++){
			total+=(grid[i][j]=='R' && grid[i+1][j]=='G' && grid[i+2][j]=='W');
		}
	}
	assert(total+2<=3e6);
	//cout<<total<<"\n";
	graph.init(total+2)	;
	int ton = cnt;
	for(int j=0;j<m;j++){
		for(int i=0;i+2<n;i++){
			if(grid[i][j]=='R' && grid[i+1][j]=='G' && grid[i+2][j]=='W'){
				ton++;
				if(taken[i][j]) graph.add_edge(taken[i][j],ton,1);
				if(taken[i+1][j]) graph.add_edge(taken[i+1][j],ton,1);
				if(taken[i+2][j]) graph.add_edge(taken[i+2][j],ton,1);
			}
		}
	}	

	for(int i=1;i<=cnt;i++){
		graph.add_edge(0,i,1);
	}
	for(int i=cnt+1;i<=total;i++){
		graph.add_edge(i,total+1,1);
	}
	ll ans = graph.flow(0,total+1);
	cout<<total-ans<<"\n";
	return 0;
}

Compilation message

dango_maker.cpp: In member function 'll DINIC::dfs(int, int, ll)':
dango_maker.cpp:49:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |   for(;nxt[v]<side[v].size();nxt[v]++){
      |        ~~~~~~^~~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 73560 KB Output is correct
2 Correct 15 ms 73560 KB Output is correct
3 Correct 15 ms 73560 KB Output is correct
4 Correct 15 ms 73560 KB Output is correct
5 Correct 16 ms 73700 KB Output is correct
6 Correct 15 ms 73564 KB Output is correct
7 Correct 15 ms 73560 KB Output is correct
8 Correct 16 ms 73560 KB Output is correct
9 Correct 15 ms 73560 KB Output is correct
10 Correct 16 ms 73564 KB Output is correct
11 Correct 15 ms 73564 KB Output is correct
12 Correct 15 ms 73564 KB Output is correct
13 Correct 15 ms 73560 KB Output is correct
14 Correct 15 ms 73560 KB Output is correct
15 Correct 15 ms 73560 KB Output is correct
16 Correct 16 ms 73564 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 73560 KB Output is correct
2 Correct 15 ms 73560 KB Output is correct
3 Correct 15 ms 73560 KB Output is correct
4 Correct 15 ms 73560 KB Output is correct
5 Correct 16 ms 73700 KB Output is correct
6 Correct 15 ms 73564 KB Output is correct
7 Correct 15 ms 73560 KB Output is correct
8 Correct 16 ms 73560 KB Output is correct
9 Correct 15 ms 73560 KB Output is correct
10 Correct 16 ms 73564 KB Output is correct
11 Correct 15 ms 73564 KB Output is correct
12 Correct 15 ms 73564 KB Output is correct
13 Correct 15 ms 73560 KB Output is correct
14 Correct 15 ms 73560 KB Output is correct
15 Correct 15 ms 73560 KB Output is correct
16 Correct 16 ms 73564 KB Output is correct
17 Correct 15 ms 73560 KB Output is correct
18 Correct 15 ms 73560 KB Output is correct
19 Correct 15 ms 73564 KB Output is correct
20 Correct 15 ms 73560 KB Output is correct
21 Correct 15 ms 73560 KB Output is correct
22 Correct 16 ms 73560 KB Output is correct
23 Correct 15 ms 73560 KB Output is correct
24 Correct 15 ms 73560 KB Output is correct
25 Correct 16 ms 73560 KB Output is correct
26 Correct 15 ms 73560 KB Output is correct
27 Correct 15 ms 73564 KB Output is correct
28 Correct 15 ms 73560 KB Output is correct
29 Correct 16 ms 73560 KB Output is correct
30 Correct 16 ms 73564 KB Output is correct
31 Correct 16 ms 73560 KB Output is correct
32 Correct 16 ms 73560 KB Output is correct
33 Correct 16 ms 73560 KB Output is correct
34 Correct 15 ms 73560 KB Output is correct
35 Correct 16 ms 73560 KB Output is correct
36 Correct 15 ms 73564 KB Output is correct
37 Correct 15 ms 73560 KB Output is correct
38 Correct 15 ms 73560 KB Output is correct
39 Correct 16 ms 73560 KB Output is correct
40 Correct 18 ms 73560 KB Output is correct
41 Correct 16 ms 73560 KB Output is correct
42 Correct 15 ms 73560 KB Output is correct
43 Correct 16 ms 73564 KB Output is correct
44 Correct 16 ms 73564 KB Output is correct
45 Correct 16 ms 73560 KB Output is correct
46 Correct 15 ms 73620 KB Output is correct
47 Correct 17 ms 73820 KB Output is correct
48 Correct 15 ms 73560 KB Output is correct
49 Correct 15 ms 73704 KB Output is correct
50 Correct 15 ms 73560 KB Output is correct
51 Correct 16 ms 73560 KB Output is correct
52 Correct 15 ms 73564 KB Output is correct
53 Correct 15 ms 73560 KB Output is correct

Subtask #3
0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 73560 KB Output is correct
2 Correct 15 ms 73560 KB Output is correct
3 Correct 15 ms 73560 KB Output is correct
4 Correct 15 ms 73560 KB Output is correct
5 Correct 16 ms 73700 KB Output is correct
6 Correct 15 ms 73564 KB Output is correct
7 Correct 15 ms 73560 KB Output is correct
8 Correct 16 ms 73560 KB Output is correct
9 Correct 15 ms 73560 KB Output is correct
10 Correct 16 ms 73564 KB Output is correct
11 Correct 15 ms 73564 KB Output is correct
12 Correct 15 ms 73564 KB Output is correct
13 Correct 15 ms 73560 KB Output is correct
14 Correct 15 ms 73560 KB Output is correct
15 Correct 15 ms 73560 KB Output is correct
16 Correct 16 ms 73564 KB Output is correct
17 Correct 15 ms 73560 KB Output is correct
18 Correct 15 ms 73560 KB Output is correct
19 Correct 15 ms 73564 KB Output is correct
20 Correct 15 ms 73560 KB Output is correct
21 Correct 15 ms 73560 KB Output is correct
22 Correct 16 ms 73560 KB Output is correct
23 Correct 15 ms 73560 KB Output is correct
24 Correct 15 ms 73560 KB Output is correct
25 Correct 16 ms 73560 KB Output is correct
26 Correct 15 ms 73560 KB Output is correct
27 Correct 15 ms 73564 KB Output is correct
28 Correct 15 ms 73560 KB Output is correct
29 Correct 16 ms 73560 KB Output is correct
30 Correct 16 ms 73564 KB Output is correct
31 Correct 16 ms 73560 KB Output is correct
32 Correct 16 ms 73560 KB Output is correct
33 Correct 16 ms 73560 KB Output is correct
34 Correct 15 ms 73560 KB Output is correct
35 Correct 16 ms 73560 KB Output is correct
36 Correct 15 ms 73564 KB Output is correct
37 Correct 15 ms 73560 KB Output is correct
38 Correct 15 ms 73560 KB Output is correct
39 Correct 16 ms 73560 KB Output is correct
40 Correct 18 ms 73560 KB Output is correct
41 Correct 16 ms 73560 KB Output is correct
42 Correct 15 ms 73560 KB Output is correct
43 Correct 16 ms 73564 KB Output is correct
44 Correct 16 ms 73564 KB Output is correct
45 Correct 16 ms 73560 KB Output is correct
46 Correct 15 ms 73620 KB Output is correct
47 Correct 17 ms 73820 KB Output is correct
48 Correct 15 ms 73560 KB Output is correct
49 Correct 15 ms 73704 KB Output is correct
50 Correct 15 ms 73560 KB Output is correct
51 Correct 16 ms 73560 KB Output is correct
52 Correct 15 ms 73564 KB Output is correct
53 Correct 15 ms 73560 KB Output is correct
54 Correct 15 ms 73564 KB Output is correct
55 Correct 16 ms 73816 KB Output is correct
56 Correct 16 ms 73816 KB Output is correct
57 Correct 16 ms 74072 KB Output is correct
58 Correct 49 ms 84752 KB Output is correct
59 Correct 420 ms 155892 KB Output is correct
60 Correct 445 ms 156664 KB Output is correct
61 Correct 431 ms 156156 KB Output is correct
62 Correct 15 ms 73560 KB Output is correct
63 Correct 410 ms 153588 KB Output is correct
64 Runtime error 189 ms 234648 KB Execution killed with signal 6
65 Halted 0 ms 0 KB -