Submission #1292412

#	Time	Username	Problem	Language	Result	Execution time	Memory
1292412		trandaihao5555	Furniture (JOI20_furniture)	C++20	0 / 100	4106 ms	589824 KiB

furniture

#include <bits/stdc++.h>

#define int long long

#define debug     cout << "ok\n";
#define SQR(x)    (1LL * ((x) * (x)))
#define MASK(i)   (1LL << (i))
#define BIT(x, i) (((x) >> (i)) & 1)
#define fi        first
#define se        second
#define pb        push_back

#define mp make_pair
#define pii pair<int,int>
#define pli pair<ll,int>
#define vi vector<int>

#define FAST ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef unsigned int ui;

using namespace std;

const int M = 1e9 + 7;
const int INF = 1e9 + 7;
const ll INFLL = (ll)2e18 + 7LL;
const ld PI = acos(-1);

const int dx[] = {1, 0, 0, -1, -1, 1, 1, -1};
const int dy[] = {0, 1, -1, 0, -1, -1, 1, 1};

template<class _, class __>
    bool minimize(_ &x, const __ y){
        if(x > y){
            x = y;
            return true;
        } else return false;
    }
template<class _, class __>
    bool maximize(_ &x, const __ y){
        if(x < y){
            x = y;
            return true;
        } else return false;
    }

template<class _,class __>
    void Add(_ &x, const __ y) {
        x += y;
        if (x >= M) {
            x -= M;
        }
        return;
    }

template<class _,class __>
    void Diff(_ &x, const __ y) {
        x -= y;
        if (x < 0) {
            x += M;
        }
        return;
    }

//--------------------------------------------------------------

const int MaxN = 1007;

int n,m,q;
bool f[MaxN][MaxN],g[MaxN][MaxN];
char a[MaxN][MaxN];

void prepare() {
    for (int i=0;i<=m+1;i++) f[n+1][i] = f[0][i] = g[n+1][i] = g[0][i] = true;
    for (int i=0;i<=n+1;i++) f[i][0] = f[i][m+1] = g[i][0] = g[i][m+1] = true;
}

bool inSide(int x,int y) {
    return 1 <= x && x <= n && 1 <= y && y <= m;
}

void Del(int _x,int _y) {
    queue<pii> q;
    q.push(mp(_x,_y));
    while (!q.empty()) {
        int x = q.front().fi;
        int y = q.front().se;
        q.pop();
        f[x][y] = true;
        for (int i=0;i<2;i++) {
            int xx = x + dx[i];
            int yy = y + dy[i];
            if (!inSide(xx,yy)) continue;
            int cnt = 0;
            for (int j=0;j<2;j++) {
                int xxx = xx - dx[j];
                int yyy = yy - dy[j];
                cnt += f[xxx][yyy];
            }
            if (cnt == 2) q.push(mp(xx,yy));
        }
    }

    q.push(mp(_x,_y));
    while (!q.empty()) {
        int x = q.front().fi;
        int y = q.front().se;
        q.pop();
        g[x][y] = true;
        for (int i=2;i<4;i++) {
            int xx = x + dx[i];
            int yy = y + dy[i];
            if (!inSide(xx,yy)) continue;
            int cnt = 0;
            for (int j=2;j<4;j++) {
                int xxx = xx - dx[j];
                int yyy = yy - dy[j];
                cnt += g[xxx][yyy];
            }
            if (cnt == 2) q.push(mp(xx,yy));
        }
    }
}

void sol() {
    cin >> n >> m;
    prepare();
    for (int i=1;i<=n;i++) {
        for (int j=1;j<=m;j++) {
            cin >> a[i][j];
            if (a[i][j] == '1') Del(i,j);
        }
    }
    cin >> q;
    for (int i=1;i<=q;i++) {
//        for (int j=1;j<=n;j++) {
//            for (int k=1;k<=m;k++) {
//                cout << f[j][k];
//            }
//            cout << '\n';
//        }
//        for (int j=1;j<=n;j++) {
//            for (int k=1;k<=m;k++) {
//                cout << g[j][k];
//            }
//            cout << '\n';
//        }
        int x,y;
        cin >> x >> y;
        bool ch = false;
        for (int j=1;j<=n;j++) {
            int xx = j;
            int yy = x + y - j;
            if (!inSide(xx,yy) || (x == xx && y == yy)) continue;
            if (!f[xx][yy] && !g[xx][yy]) ch = true;
        }
        cout << ch << '\n';
        if (ch) Del(x,y);
    }
}

signed main() {
//    freopen("test.inp","r",stdin);
//    freopen("test.out","w",stdout);
    FAST
    int t=1;
//    cin >> t;
    while (t--) sol();
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 95