Submission #227820

#TimeUsernameProblemLanguageResultExecution timeMemory
227820kig9981Dango Maker (JOI18_dango_maker)C++17
100 / 100
217 ms19064 KiB
#include <bits/stdc++.h>

#ifdef NON_SUBMIT
#define TEST(n) (n)
#define tout cerr
#else
#define TEST(n) ((void)0)
#define tout cin
#endif

using namespace std;

vector<string> F;
int N, M, D[3];

bool valid_coord(int x, int y)
{
	return 0<=x && x<N && 0<=y && y<M;
}

bool check_V(int x, int y)
{
	return x && x+1<N && F[x-1][y]=='R' && F[x][y]=='G' && F[x+1][y]=='W';
}

bool check_H(int x, int y)
{
	return y && y+1<M && F[x][y-1]=='R' && F[x][y]=='G' && F[x][y+1]=='W';
}

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(NULL); cout.tie(NULL);
	TEST(freopen("input.txt","r",stdin));
	TEST(freopen("output.txt","w",stdout));
	TEST(freopen("debug.txt","w",stderr));
	int x, y, T[3], ans=0;
	cin>>N>>M; F.resize(N);
	for(int i=0;i<N;i++) cin>>F[i];
	for(int i=0;i<N+M-1;i++) {
		int mx=0;
		for(int k=0;k<3;k++) D[k]=0;
		for(int j=0;j<N;j++) if(valid_coord(x=j,y=i-j)) {
			for(int k=0;k<3;k++) T[k]=D[k];
			D[0]=max({T[0],T[1],T[2]});
			if(check_V(x,y)) D[1]=max(T[0],T[1])+1;
			if(check_H(x,y)) D[2]=max(T[0],T[2])+1;
			mx=max({D[0],D[1],D[2]});
		}
		ans+=mx;
	}
	cout<<ans<<'\n';
	return 0;
}
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