제출 #367868

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
367868		vaaven	Dango Maker (JOI18_dango_maker)	C++14	13 / 100	35 ms	47596 KiB

dango_maker

#include <iostream>
#include <vector>
#include <algorithm>
#include <math.h>
#include <set>
#include <stack>
#include <iomanip>
#include <bitset>
#include <map>
#include <cassert>
#include <array>
#include <queue>
#include <cstring>
#include <random>
#include <unordered_set>
#include <unordered_map>
#define pqueue priority_queue
#define pb(x) push_back(x)
// #define endl '\n'
#define all(x) x.begin(), x.end()
 #define int long  long
    
using namespace std;
    
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef vector<int> vi;
typedef vector<vector<int> > vvi;
// typedef tuple<ll, ll, ll> tiii;
typedef pair<int, int> pii;
typedef vector<pair<int, int> > vpii;
typedef vector<bool> vb;
typedef vector<string> vs;
typedef vector<char> vc;
    
const int inf = 1e9 + 228;
const int infll = 1e18;
const ll mod = 1e9 + 7;
const ll mod2 = 998244353;
const ld eps = 1e-14;
    
    
void fast_io(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
   // freopen("a.in", "r", stdin);
//    freopen("outputik.txt", "w", stdout);
}

const int maxn = 3e3;

string kek[maxn];
int lol[maxn][maxn][2];
bool used[2000000];

vi g[2000000];
int cnt = 0;


int dfs(int v, int col = 0){
    int cur = col;
    cnt++;
    used[v] = true;
    for(int i:g[v]){
        if(!used[i]){
            cur += dfs(i, col^1);
        }
    }
    return cur;
}

void solve(){
    int n, m;
    cin >> n >> m;
    for(int i=0; i<n; i++){
        cin >> kek[i];
    }
    for(int i=0; i<n; i++){
        for(int j=0; j<m; j++){
            lol[i][j][0] = lol[i][j][1] = -1;
        }
    }
    int count = 0;
    for(int i=0; i<n; i++){
        for(int j=0; j<m; j++){
            if(j + 2 < m && kek[i][j] == 'R' && kek[i][j+1] == 'G' && kek[i][j+2] == 'W'){
                lol[i][j][1] = count;
                lol[i][j+1][1] = count;
                lol[i][j+2][1] = count++;
            }
            if(i + 2 < n && kek[i][j] == 'R' && kek[i+1][j] == 'G' && kek[i+2][j] == 'W'){
                lol[i][j][0] = count;
                lol[i+1][j][0] = count;
                lol[i+2][j][0] = count++;
            }
            if(lol[i][j][0] >= 0 && lol[i][j][1] >= 0){
//                cout << i << " " << j << endl;
                g[lol[i][j][0]].pb(lol[i][j][1]);
                g[lol[i][j][1]].pb(lol[i][j][0]);
            }
        }
    }
    int ans = 0;
    for(int i=0; i<count; i++){
        if(!used[i]){
            cnt = 0;
            int kek = dfs(i);
//            cout << kek << endl;
            ans += max(kek, cnt-kek);
        }
    }
    cout << ans << endl;
}

signed main(){
     fast_io();
//  ;(time(NULL));
    cout << fixed << setprecision(10);
    int q = 1;
//    cin >> q;
    while(q--)
        solve();
}

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