Submission #893770

#	Time	Username	Problem	Language	Result	Execution time	Memory
893770		Aiperiii	Dango Maker (JOI18_dango_maker)	C++14	100 / 100	276 ms	102012 KiB

dango_maker

#include <bits/stdc++.h>
#define int long long
#define all(x) x.begin(),x.end()
#define ff first
#define ss second
#define pb push_back
using namespace std;
char a[3005][3005];
vector <int> ind[6005];
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n,m;
    cin>>n>>m;
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            cin>>a[i][j];
            ind[i+j].pb(i);
        }
    }
    
    int ans=0;
    for(int i=0;i<n+m-1;i++){
        
        int dp[ind[i].size()+1][3];
        dp[ind[i].size()][0]=0;
        dp[ind[i].size()][1]=0;
        dp[ind[i].size()][2]=0;
        
        for(int j=ind[i].size()-1;j>=0;j--){
            int x=ind[i][j],y=i-ind[i][j];
            dp[j][0]=0;dp[j][1]=0;dp[j][2]=0;
            dp[j][0]=max({dp[j+1][0],dp[j+1][1],dp[j+1][2]});
            if(y+1<m && y-1>=0 && a[x][y]=='G' && a[x][y+1]=='W' && a[x][y-1]=='R'){
                dp[j][1]=max(dp[j+1][0],dp[j+1][1])+1;
            }
            if(x+1<n && x-1>=0 && a[x][y]=='G' && a[x+1][y]=='W' && a[x-1][y]=='R'){
                dp[j][2]=max(dp[j+1][0],dp[j+1][2])+1;
            }
        }
        ans+=max({dp[0][0],dp[0][1],dp[0][2]});
    }
    cout<<ans<<"\n";
}

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