Submission #984019

#	Time	Username	Problem	Language	Result	Execution time	Memory
984019		irmuun	Dango Maker (JOI18_dango_maker)	C++17	100 / 100	272 ms	67780 KiB

dango_maker

#include<bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    int n,m;
    cin>>n>>m;
    char s[n+5][m+5];
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            cin>>s[i][j];
        }
    }
    vector<int>v[n+m+5];
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            int cur=0;
            if((i>1&&s[i-1][j]=='R')&&s[i][j]=='G'&&(i<n&&s[i+1][j]=='W')){
                cur+=1;
            }
            if((j>1&&s[i][j-1]=='R')&&s[i][j]=='G'&&(j<m&&s[i][j+1]=='W')){
                cur+=2;
            }
            v[i+j].pb(cur);
        }
    }
    int ans=0;
    vector<int>dp(3),dp1(3);
    for(int i=2;i<=n+m;i++){
        fill(all(dp),0);
        for(auto num:v[i]){
            for(int j=0;j<3;j++){
                dp1[j]=dp[j];
                dp[j]=0;
            }
            dp[0]=max({dp1[0],dp1[1],dp1[2]});
            if(num&1) dp[1]=max(dp1[0],dp1[1])+1;
            if(num&2) dp[2]=max(dp1[0],dp1[2])+1;
        }
        ans+=max({dp[0],dp[1],dp[2]});
    }
    cout<<ans;
}

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