Submission #948225

#	Time	Username	Problem	Language	Result	Execution time	Memory
948225		ezzzay	Dango Maker (JOI18_dango_maker)	C++14	13 / 100	2 ms	4564 KiB

dango_maker

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define ff first
#define ss second
#define double long double
const int N=3e3+6;
char arr[N][N];
int ans=0;
int n,m;
int dp[N][N];
void fun(int y, int x, int w){
    if(dp[y][x]>w+1)return;
    dp[y][x]=w;
    ans=max(ans,w);
    for(int i=y;i<=n;i++){
        if(i==y){
            for(int j=x;j<=m;j++){
                if(arr[i][j]=='R' and arr[i][j+1]=='G' and arr[i][j+2]=='W' and dp[i][j]<=w){
                    arr[i][j]='X';
                    arr[i][j+1]='X';
                    arr[i][j+2]='X';
                    fun(i,j,w+1);
                    arr[i][j]='R';
                    arr[i][j+1]='G';
                    arr[i][j+2]='W';
                }
                if(arr[i][j]=='R' and arr[i+1][j]=='G' and arr[i+2][j]=='W' and dp[i][j]<=w){
                    
                    arr[i][j]='X';
                    arr[i+1][j]='X';
                    arr[i+2][j]='X';
                    fun(i,j,w+1);
                    arr[i][j]='R';
                    arr[i+1][j]='G';
                    arr[i+2][j]='W';
                }
            }
        }
        else{
            for(int j=1;j<=m;j++){
                if(arr[i][j]=='R' and arr[i][j+1]=='G' and arr[i][j+2]=='W' and dp[i][j]<=w ){
                    arr[i][j]='X';
                    arr[i][j+1]='X';
                    arr[i][j+2]='X';
                    fun(i,j,w+1);
                    arr[i][j]='R';
                    arr[i][j+1]='G';
                    arr[i][j+2]='W';
                }
                if(arr[i][j]=='R' and arr[i+1][j]=='G' and arr[i+2][j]=='W' and dp[i][j]<=w ){
                    
                    arr[i][j]='X';
                    arr[i+1][j]='X';
                    arr[i+2][j]='X';
                    fun(i,j,w+1);
                    arr[i][j]='R';
                    arr[i+1][j]='G';
                    arr[i+2][j]='W';
                }
            }
        }
    }
}
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin>>n>>m;
    int cnt=0;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            dp[i][j]=0;
            cin>>arr[i][j];
        }
    }
    fun(1,1,0);
    cout<<ans;
}

Compilation message (stderr)

dango_maker.cpp: In function 'int main()':
dango_maker.cpp:70:9: warning: unused variable 'cnt' [-Wunused-variable]
   70 |     int cnt=0;
      |         ^~~

• Subtask 1: 13 / 13
• Subtask 2: 0 / 20
• Subtask 3: 0 / 67