Submission #116112

#	Time	Username	Problem	Language	Result	Execution time	Memory
116112		faustaadp	Dango Maker (JOI18_dango_maker)	C++17	13 / 100	214 ms	262144 KiB

dango_maker

#include<bits/stdc++.h>
typedef long long ll;
#define pb push_back
#define mp make_pair
#define fi first
#define se second
using namespace std;
ll n,m,i,j,has,te;
char a[3030][3030];
int x[9000010];
int b[3000010];
int mat[3000010];
vector<int> v[3000010];
ll dfs(ll aa)
{
	if(b[aa]==i)
		return 0;
	b[aa]=1;
	ll ii;
	for(ii=0;ii<v[aa].size();ii++)
		if(mat[v[aa][ii]]==-1||dfs(mat[v[aa][ii]]))
		{
			mat[v[aa][ii]]=aa;
			return 1;
		}
	return 0;
}
int main()
{
	ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin>>n>>m;
	for(i=1;i<=n;i++)
		for(j=1;j<=m;j++)
			cin>>a[i][j];
	for(i=1;i<=n;i++)
		for(j=1;j<=m;j++)
		{
			if(j+2<=m&&a[i][j]=='R'&&a[i][j+1]=='G'&&a[i][j+2]=='W')
			{
				te++;
				has++;
				x[(i-1)*m+j]=te;
				x[(i-1)*m+j+1]=te;
				x[(i-1)*m+j+2]=te;
			}
		}
	ll hai=te;
	for(i=1;i<=n;i++)
		for(j=1;j<=m;j++)
		{
			if(i+2<=n&&a[i][j]=='R'&&a[i+1][j]=='G'&&a[i+2][j]=='W')
			{
				te++;
				has++;
				if(x[(i-1)*m+j]!=0)
				{
					v[x[(i-1)*m+j]].pb(te);
				}
				if(x[(i)*m+j]!=0)
				{
					v[x[(i)*m+j]].pb(te);
				}
				if(x[(i+1)*m+j]!=0)
				{
					v[x[(i+1)*m+j]].pb(te);
				}
			}				
		}
	memset(mat,-1,sizeof(mat));
	for(i=1;i<=hai;i++)
	{
		has-=dfs(i);
	}
	cout<<has<<"\n";
}

Compilation message (stderr)

dango_maker.cpp: In function 'll dfs(ll)':
dango_maker.cpp:20:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(ii=0;ii<v[aa].size();ii++)
           ~~^~~~~~~~~~~~~

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