제출 #946284

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
946284		efedmrlr	Furniture (JOI20_furniture)	C++17	100 / 100	196 ms	16036 KiB

furniture

// #pragma GCC optimize("O3,Ofast,unroll-loops")
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>

using namespace std;


#define lli long long int
#define MP make_pair
#define pb push_back
#define REP(i,n) for(int i = 0; (i) < (n); (i)++)
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()


void fastio() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
}


const double EPS = 0.00001;
const int INF = 1e9+500;
const int N = 1005;
const int ALPH = 26;
const int LGN = 25;
constexpr int MOD = 1e9+7;
int n,m,q;

vector<int> diag;
vector<vector<int> > r;

void dfsf(int x, int y) {
    if(x > n || y > m) return;
    if(r[x][y]) return;
    if(r[x][y - 1] && r[x - 1][y]) {
        r[x][y] = 1;
        diag[x + y] += 1;
        dfsf(x + 1, y);
        dfsf(x, y + 1);
    }
}
void dfsb(int x, int y) {
    // cout << "x:" << x << " y:" << y << "\n";
    if(x < 1 || y < 1) return;
    if(r[x][y]) return;
    if(r[x + 1][y] && r[x][y + 1]) {
        r[x][y] = 1;
        diag[x + y] += 1;
        dfsb(x - 1, y); dfsb(x, y - 1);
    } 
}
void blck(int x, int y) {
    
    r[x][y] = 1;
    diag[x + y] += 1;
    dfsf(x + 1, y); dfsf(x, y + 1);
    dfsb(x - 1, y); dfsb(x, y - 1);
}
inline void solve() {
    cin>>n>>m;
    r.assign(n + 5, vector<int>(m + 5, 0));
    diag.assign(n + m + 3, 0);
    for(int i = 0; i <= n; i++) {
        r[i][0] = r[i][m + 1] = 1;
    }
    for(int i = 0; i <= m; i++) {
        r[0][i] = r[n + 1][i] = 1; 
    }
    for(int i = 1; i<=n; i++) {
        for(int j = 1; j <= m; j++) {
            int tmp;
            cin >> tmp;
            if(tmp) {
                if(r[i][j] == 1) continue;
                blck(i, j);
            }
        }
    }
    cin >> q;

    for(int z = 1; z<=q; z++) {
        // for(int i = 1; i <=n; i++) {
        //     for(int j = 1; j <= m; j ++) {
        //         cout << r[i][j] << " ";
        //     }
        //     cout << "\n";
        // }
        int x,y;
        cin >> x >> y;
        if(r[x][y]) {
            cout << "1\n";
            continue;
        }
        int sum = x + y;
        // cout << "cnt:" << (min(n, sum - 1) - max(1, sum - m) + 1) << "\n";
        // cout << diag[sum] << "\n";
        if((min(n, sum - 1) - max(1, sum - m) + 1) - diag[sum] > 1) {
            cout << "1\n";
            blck(x, y);
        }
        else {
            cout << "0\n";
        }
    }

}
 
signed main() {

    fastio();
    int test = 1;
    //cin>>test;
    while(test--) {
        solve();
    }
    
}

• Subtask 1: 5 / 5
• Subtask 2: 95 / 95