Submission #1180637

#	Time	Username	Problem	Language	Result	Execution time	Memory
1180637		asli_bg	Dango Maker (JOI18_dango_maker)	C++20	0 / 100	0 ms	328 KiB

dango_maker

#include<bits/stdc++.h>
using namespace std;

#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;

#define int long long
//#define int double

typedef pair<int,int> pii;
typedef vector<pii> vii;
typedef vector<int> vi;
typedef vector<bool> vb;

#define FOR(i,a) for(int i=0;i<(a);i++)
#define FORE(i,a,b) for(int i=(a);i<(b);i++)

#define all(x) x.begin(),x.end()
#define fi first
#define se second
#define pb push_back
#define sp <<" "<<

#define cont(x) for(auto el:x) cout<<el<<' ';cout<<endl;
#define contp(x) for(auto el:x) cout<<el.fi<<'-'<<el.se<<' ';cout<<endl;

#define DEBUG(x) cout<<#x sp x<<endl;
#define carp(x,y) ((x%MOD)*(y%MOD))%MOD
#define topla(x,y) ((x%MOD)+(y%MOD))%MOD
#define mid (l+r)/2

const int MAXN=3e3+5;
const int MOD=1e9+7;
const int INF=1e18;

int say[MAXN][MAXN];
int ans;

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    ans=0;

    int n,m;
    cin>>n>>m;
    vector<string> grid(n);
    FOR(i,n){
        cin>>grid[i];
        FOR(j,m){
            if(grid[i][j]=='W'){
                if(j-2>=0){
                    if(grid[i][j-1]=='G' and grid[i][j-2]=='R'){
                        say[i][j]++;
                        say[i][j-1]++;
                        say[i][j-2]++;
                    }
                }

                if(i-2>=0){
                    if(grid[i-1][j]=='G' and grid[i-2][j]=='R'){
                        say[i][j]++;
                        say[i-1][j]++;
                        say[i-2][j]++;
                    }
                }
            }
        }
    }

    vector<vb> used(n, vb(m,false));

    FOR(i,n){
        FOR(j,m){
            if(grid[i][j]=='W'){
                if(i-2>=0){
                    if(grid[i-1][j]=='G' and grid[i-2][j]=='R'){
                        bool f=(used[i-1][j] or used[i-2][j] or used[i][j]);
                        int top=say[i-2][j]+say[i-1][j]+say[i][j];
                        if(f==false and top<=4){
                            used[i-2][j]=used[i-1][j]=used[i][j]=true;
                            ans++;
                        }
                        else{
                            if(say[i-2][j]==2 and !used[i-2][j]){
                                used[i-2][j]=used[i-2][j+1]=used[i-2][j+2]=true;
                                ans++;
                            }
                            if(say[i-1][j]==2 and !used[i-1][j]){
                                used[i-1][j-1]=used[i-1][j]=used[i-1][j+1]=true;
                                ans++;
                            }
                            if(say[i][j]==2 and !used[i][j]){
                                used[i][j-2]=used[i][j-1]=used[i][j]=true;
                                ans++;
                            }
                        }
                    }
                }
                if(!used[i][j] and j-2>=0){
                    if(grid[i][j-1]=='G' and grid[i][j-2]=='R'){
                        used[i][j-2]=used[i][j-1]=used[i][j]=true;
                        ans++;
                    }
                }
            }
        }
    }

    cout<<ans<<endl;
}   

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