Submission #116119

#	Time	Username	Problem	Language	Result	Execution time	Memory
116119		faustaadp	Dango Maker (JOI18_dango_maker)	C++17	100 / 100	241 ms	56184 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];
bool mat[3000010];
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++;
				ll udah=0;
				if(x[(i-1)*m+j]!=0)
				{
					if(mat[x[(i-1)*m+j]]==0)
					{
						mat[x[(i-1)*m+j]]=1;
						udah=1;
					}
				}
				if(x[(i)*m+j]!=0)
				{
					if(mat[x[(i)*m+j]]==0&&udah==0)
					{
						mat[x[(i)*m+j]]=1;
						udah=1;
					}
				}
				if(x[(i+1)*m+j]!=0)
				{
					if(mat[x[(i+1)*m+j]]==0&&udah==0)
					{
						mat[x[(i+1)*m+j]]=1;
						udah=1;
					}
				}
				has-=udah;
			}				
		}
	cout<<has<<"\n";
}

Compilation message (stderr)

dango_maker.cpp: In function 'int main()':
dango_maker.cpp:31:5: warning: unused variable 'hai' [-Wunused-variable]
  ll hai=te;
     ^~~

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