Submission #349027

#	Time	Username	Problem	Language	Result	Execution time	Memory
349027		apostoldaniel854	Furniture (JOI20_furniture)	C++14	100 / 100	303 ms	13036 KiB

furniture

#include <bits/stdc++.h>

using namespace std;

#define pb push_back

const int MAX_N = 1000;
bool blocked[1 + MAX_N + 1][1 + MAX_N + 1];
int diag[1 + 2 * MAX_N];

int n, m;
void go_stupid (int x, int y) {
    if (x >= 1 && x <= n && y >= 1 && y <= m) {
        if (not blocked[x][y]) {
            blocked[x][y] = true;
            diag[x + y]--;
            if (x == 1 ||  y == m || blocked[x - 1][y + 1]) {
                go_stupid (x, y + 1);
                go_stupid (x - 1, y);
            }
            if (x == n || y == 1 || blocked[x + 1][y - 1]) {
                go_stupid (x, y - 1);
                go_stupid (x + 1, y);
            }
        }
    }
}
int main() {
    ios::sync_with_stdio (false);
    cin.tie (0); cout.tie (0);
    cin >> n >> m;
    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= m; j++)
            diag[i + j]++;
    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= m; j++) {
            int x;
            cin >> x;
            if (x)
                go_stupid (i, j);
        }
    int q;
    cin >> q;
    while (q--) {
        int x, y;
        cin >> x >> y;
        if (blocked[x][y])
            cout << "1\n";
        else if (diag[x + y] == 1)
            cout << "0\n";
        else {
            cout << "1\n";
            go_stupid (x, y);
        }
    }
    return 0;
}

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