Submission #1236416

#	Time	Username	Problem	Language	Result	Execution time	Memory
1236416		Geforgs	Dango Maker (JOI18_dango_maker)	C++20	0 / 100	0 ms	328 KiB

dango_maker

#include <iostream>
#include <iomanip>
#include <vector>
#include <cmath>
#include <algorithm>
#include <set>
#include <queue>
#include <map>
#include <unordered_map>
#include <stack>
#include <bitset>
#include <string>
#include <cstring>
#include <iterator>
#include <random>
#define ll int
#define ld long double
#define inf (ll)(2*1e18)
#define sort(a) sort(a.begin(), a.end())
#define reverse(a) reverse(a.begin(), a.end())
#define pb push_back
#define endl "\n"
using namespace std;

bool DFS(ll id, vector<vector<ll>>& b, vector<ll>& go, vector<bool>& visited){
    if(visited[id]) return false;
    visited[id] = true;
    for(auto el: b[id]){
        if(go[el] == -1){
            go[el] = id;
            return true;
        }
        if(DFS(go[el], b, go, visited)){
            go[el] = id;
            return true;
        }
    }
    return false;
}

void solve(){
    ll n, m, i, j, res=0, cnt=0, cnt1=0, dif;
    cin>>n>>m;
    vector<vector<char>> a(n, vector<char>(m));
    vector<vector<ll>> c(n, vector<ll>(m, -1));
    vector<vector<ll>> b;
    for(i=0;i<n;++i){
        for(j=0;j<m;++j){
            cin>>a[i][j];
        }
    }
    for(i=0;i<n-2;++i){
        for(j=0;j<m;++j){
            if(a[i][j] == 'R' and a[i+1][j] == 'G' and a[i+2][j] == 'W'){
                c[i][j] = cnt;
                c[i+1][j] = cnt;
                c[i+2][j] = cnt;
                ++cnt;
                ++cnt1;
//                b.pb(vector<ll>());
            }
        }
    }
    vector<bool> matched(cnt, false);
    for(i=0;i<n;++i){
        for(j=0;j<m-2;++j){
            if(a[i][j] == 'R' and a[i][j+1] == 'G' and a[i][j+2] == 'W'){
                ++cnt;
//                b.pb(vector<ll>());
                if(c[i][j] != -1 and !matched[c[i][j]]){
                    matched[c[i][j]] = true;
                    ++res;
                    continue;
                }
                if(c[i][j+1] != -1 and !matched[c[i][j+1]]){
                    matched[c[i][j+1]] = true;
                    ++res;
                    continue;
                }
                if(c[i][j+2] != -1 and !matched[c[i][j+2]]){
                    matched[c[i][j+2]] = true;
                    ++res;
                    continue;
                }
            }
        }
    }
//    vector<ll> go(cnt, -1);
//    vector<bool> set(cnt1, false);
//    do{
//        dif = 0;
//        vector<bool> visited(cnt1, false);
//        for(i=0;i<cnt1;++i){
//            if(set[i]) continue;
//            if(DFS(i, b, go, visited)){
//                set[i] = true;
//                ++dif;
//            }
//        }
//    }while(dif);
//    for(i=cnt1;i<cnt;++i){
//        if(go[i] != -1) ++res;
//    }
    cout<<cnt - res<<endl;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    srand(time(nullptr));
    ll t=1;
//    cin>>t;
    for(;t>0;--t){
        solve();
    }
    return 0;
}

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