#include <bits/stdc++.h>
using namespace std;
const int MAXN = 1005;
const int dx[8] = {-1, -1, -1, 0, 1, 1, 1, 0};
const int dy[8] = {-1, 0, 1, 1, 1, 0, -1, -1};
int N, M;
int A[MAXN * MAXN];
int vis[MAXN * MAXN];
int adjptr[2][MAXN * MAXN];
array<pair<int, int>, 8> adj[2][MAXN * MAXN];
queue<pair<int, int>> q, qr;
void Bfs() {
for (int r = 0; r < 2; r++) {
while (!q.empty()) {
int x = q.front().first;
int y = q.front().second;
q.pop();
for (int id = 0; id < adjptr[r][x * MAXN + y]; id++) {
auto i = adj[r][x * MAXN + y][id];
int nx = i.first;
int ny = i.second;
if (vis[nx * MAXN + ny] & (1 << r)) {
continue;
}
vis[nx * MAXN + ny] |= 1 << r;
q.emplace(nx, ny);
}
}
swap(q, qr);
}
}
int AddEdge(int x, int y, int w, int z) {
adj[0][x * MAXN + y][adjptr[0][x * MAXN + y]++] = {w, z};
adj[1][w * MAXN + z][adjptr[1][w * MAXN + z]++] = {x, y};
return 1;
}
int Query(int x, int y) {
int meet = 0;
meet += (vis[(x - 1) * MAXN + y] == 1) && (vis[x * MAXN + y] == 2);
meet += (vis[x * MAXN + y + 1] == 1) && (vis[x * MAXN + y] == 2);
meet += (vis[(x - 1) * MAXN + y + 1] == 1) && (vis[x * MAXN + y] == 2);
if (meet != 0) return 0;
AddEdge(x - 1, y, x, y);
AddEdge(x, y + 1, x, y);
AddEdge(x - 1, y + 1, x, y);
if (vis[(x - 1) * MAXN + y] == 1) {
q.emplace(x - 1, y);
}
if (vis[x * MAXN + y + 1] == 1) {
q.emplace(x, y + 1);
}
if (vis[(x - 1) * MAXN + y + 1] == 1) {
q.emplace(x - 1, y + 1);
}
if (vis[x * MAXN + y] == 2) {
qr.emplace(x, y);
}
Bfs();
return 1;
}
int main() {
ios::sync_with_stdio(0);
cin.tie(0), cout.tie(0);
cin >> N >> M;
vector<pair<int, int>> place;
for (int i = 1; i <= N; i++) {
for (int j = 1; j <= M; j++) {
cin >> A[i * MAXN + j];
if (A[i * MAXN + j] == 1) {
A[i * MAXN + j] = 0;
place.emplace_back(i, j);
}
}
}
for (int i = 0; i <= N + 1; i++) {
for (int j = 0; j <= M + 1; j++) {
int s = 0, t = 0;
if (i == 0 || j == M + 1) {
s = 1;
}
if (i == N + 1 || j == 0) {
t = 1;
}
if (s + t == 1) {
if (s) {
q.emplace(i, j);
} else if (t) {
A[i * MAXN + j] = 1;
qr.emplace(i, j);
if (i - 1 >= 1) {
AddEdge(i - 1, j, i, j);
}
if (j + 1 <= M) {
AddEdge(i, j + 1, i, j);
}
if (i - 1 >= 1 && j + 1 <= M) {
AddEdge(i - 1, j + 1, i, j);
}
}
}
if (1 <= i) {
AddEdge(i, j, i - 1, j);
}
if (j <= M) {
AddEdge(i, j, i, j + 1);
}
}
}
Bfs();
for (auto i : place) {
assert(Query(i.first, i.second) == 1);
}
int Q;
cin >> Q;
for (int i = 0; i < Q; i++) {
int x, y;
cin >> x >> y;
cout << Query(x, y) << "\n";
}
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
2944 KB |
Output is correct |
2 |
Correct |
4 ms |
3584 KB |
Output is correct |
3 |
Correct |
5 ms |
3712 KB |
Output is correct |
4 |
Correct |
6 ms |
3840 KB |
Output is correct |
5 |
Correct |
7 ms |
4096 KB |
Output is correct |
6 |
Correct |
7 ms |
4096 KB |
Output is correct |
7 |
Correct |
7 ms |
4096 KB |
Output is correct |
8 |
Correct |
7 ms |
4096 KB |
Output is correct |
9 |
Correct |
7 ms |
4096 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
2944 KB |
Output is correct |
2 |
Correct |
4 ms |
3584 KB |
Output is correct |
3 |
Correct |
5 ms |
3712 KB |
Output is correct |
4 |
Correct |
6 ms |
3840 KB |
Output is correct |
5 |
Correct |
7 ms |
4096 KB |
Output is correct |
6 |
Correct |
7 ms |
4096 KB |
Output is correct |
7 |
Correct |
7 ms |
4096 KB |
Output is correct |
8 |
Correct |
7 ms |
4096 KB |
Output is correct |
9 |
Correct |
7 ms |
4096 KB |
Output is correct |
10 |
Correct |
25 ms |
9160 KB |
Output is correct |
11 |
Correct |
6 ms |
2944 KB |
Output is correct |
12 |
Correct |
409 ms |
142440 KB |
Output is correct |
13 |
Correct |
187 ms |
133988 KB |
Output is correct |
14 |
Correct |
774 ms |
135652 KB |
Output is correct |
15 |
Correct |
773 ms |
130424 KB |
Output is correct |
16 |
Correct |
865 ms |
137464 KB |
Output is correct |
17 |
Correct |
938 ms |
143800 KB |
Output is correct |
18 |
Correct |
863 ms |
139208 KB |
Output is correct |
19 |
Correct |
904 ms |
144356 KB |
Output is correct |
20 |
Correct |
658 ms |
144248 KB |
Output is correct |
21 |
Correct |
914 ms |
144324 KB |
Output is correct |