Submission #538385

#	Time	Username	Problem	Language	Result	Execution time	Memory
538385		new_acc	Dango Maker (JOI18_dango_maker)	C++14	100 / 100	655 ms	35340 KiB

dango_maker

#include<bits/stdc++.h>
#define fi first
#define se second
#define pitem item*
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;
const int N=3e3+10;
bool ok[N][N][2];
char t[N][N];
int dp[N][4];
int n,m;
int diag(int a,int b){
	int k=0;
	while(a>0 and b<=m){
		k++;
		dp[k][0]=max(dp[k-1][3],dp[k-1][0])+ok[a][b][0];
		dp[k][1]=max({dp[k-1][2],dp[k-1][1],dp[k-1][0],dp[k-1][3]})+ok[a][b][1];
		dp[k][2]=dp[k-1][1],dp[k][3]=dp[k-1][2];
		a--,b++;
	}
	return max({dp[k][0],dp[k][1],dp[k][2],dp[k][3]});
}
void solve(){
	cin>>n>>m;
	for(int i=1;i<=n;i++)
		for(int j=1;j<=m;j++) cin>>t[i][j];
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			if(t[i][j]=='R'){
				if(i+2<=n and t[i+1][j]=='G' and t[i+2][j]=='W') ok[i][j][0]=1;
				if(j+2<=m and t[i][j+1]=='G' and t[i][j+2]=='W') ok[i][j][1]=1;
			}
		}
	}
	int res=0;
	for(int i=1;i<=n;i++) res+=diag(i,1);
	for(int i=2;i<=m;i++) res+=diag(n,i);
	cout<<res<<"\n";
}
int main(){
	solve();
}

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