Submission #241268

#	Time	Username	Problem	Language	Result	Execution time	Memory
241268		dsjong	Dango Maker (JOI18_dango_maker)	C++14	0 / 100	5 ms	384 KiB

dango_maker

#include <bits/stdc++.h>
using namespace std;
set<int>node[100];
bool edge[100][100];
bool vis[100];
char a[15][15];
vector<int>adj[100];
vector<int>v;
void dfs(int x){
	vis[x]=true;
	v.push_back(x);
	for(int y:adj[x]){
		if(vis[y]) continue;
		dfs(y);
	}
}
int main(){
	int n, m;
	cin>>n>>m;
	for(int i=0;i<n;i++){
		for(int j=0;j<m;j++){
			cin>>a[i][j];
		}
	}
	int cnt=0;
	for(int i=0;i<n;i++){
		for(int j=0;j<m;j++){
			string s="";
			if(j+2<n){
				s=(s+a[i][j]+a[i][j+1]+a[i][j+2]);
				//cout<<s<<endl;
				if(s=="RGW"){
					node[cnt].insert(i*m+j);
					node[cnt].insert(i*m+j+1);
					node[cnt].insert(i*m+j+2);
					cnt++;
				}
			}
			if(i+2<n){
				s="";
				s=s+a[i][j]+a[i+1][j]+a[i+2][j];
				//cout<<s<<endl;
				if(s=="RGW"){
					node[cnt].insert(i*m+j);
					node[cnt].insert((i+1)*m+j);
					node[cnt].insert((i+2)*m+j);
					cnt++;
				}
			}
		}
	}
	memset(edge, false, sizeof edge);
	for(int i=0;i<cnt;i++){
		for(int j=i+1;j<cnt;j++){
			set<int>s;
			for(int k:node[i]) s.insert(k);
			for(int k:node[j]) s.insert(k);
			if((int)s.size()!=6){
				adj[i].push_back(j);
				adj[j].push_back(i);
				edge[i][j]=edge[j][i]=true;
				//cout<<i<<" "<<j<<endl;
			}
		}
	}
	memset(vis, false, sizeof vis);
	int sum=0;
	for(int i=0;i<cnt;i++){
		if(vis[i]) continue;
		//cout<<i<<endl;
		v.clear();
		dfs(i);
		int sz=v.size();
		vector<int>vv;
		int fans=0;
		for(int i=0;i<(1<<sz);i++){
			vv.clear();
			int ans=0;
			for(int j=0;j<sz;j++){
				if(i&(1<<j)){
					vv.push_back(v[j]);
					ans++;
				}
			}
			for(int j=0;j<vv.size();j++){
				for(int k=j+1;k<vv.size();k++){
					if(edge[v[j]][v[k]]) goto hell;
				}
			}
			fans=max(ans, fans);
			hell:;
		}
		// cout<<fans<<endl;
		sum+=fans;
	}
	cout<<sum;
}

Compilation message (stderr)

dango_maker.cpp: In function 'int main()':
dango_maker.cpp:85:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int j=0;j<vv.size();j++){
                ~^~~~~~~~~~
dango_maker.cpp:86:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int k=j+1;k<vv.size();k++){
                   ~^~~~~~~~~~

• Subtask 1: 0 / 13
• Subtask 2: 0 / 20
• Subtask 3: 0 / 67