oj.uz

Submission #299994

# Submission time Handle Problem Language Result Execution time Memory
299994 2020-09-16T05:24:14 Z quocnguyen1012 Furniture (JOI20_furniture) C++14
100 / 100
 329 ms 15864 KB 
#include <bits/stdc++.h>

#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define ar array

using namespace std;
typedef long long ll;
typedef pair<int, int> ii;

const int maxn = 1005;

int N, M;
int a[maxn][maxn], rem[2 * maxn];
int dx[] = {0, 0, 1, -1};
int dy[] = {1, -1, 0, 0};

bool inside(int x, int y) {
  return 1 <= x && x <= N && 1 <= y && y <= M;
}

void gogo(int x, int y);

void go(int x, int y){
    if((x == 1 && y == 1) || (x == N && y == M)) return;
    if(a[x][y] == 1) return;
    if((a[x - 1][y] && a[x][y - 1]) || (a[x + 1][y] && a[x][y + 1])){
        gogo(x, y);
    }
}
void gogo(int x, int y){
    if(a[x][y] == 1) return;
    a[x][y] = 1;
    rem[x + y]--;
    go(x - 1, y);
    go(x, y - 1);
    go(x + 1, y);
    go(x, y + 1);
}

void band(int x, int y) {
  if (a[x][y] == 1)
    return;
  a[x][y] = 1;
  rem[x + y]--;
  for (int i = 0; i < 4; ++i) {
    int nx = x + dx[i], ny = y + dy[i];
    if (mp(nx, ny) == mp(1, 1) || mp(nx, ny) == mp(N, M)) continue;
    if (a[nx][ny]) continue;
    if ((a[nx - 1][ny] && a[nx][ny - 1]) || (a[nx + 1][y] && a[nx][ny + 1])) {
      band(nx, ny);
    }
  }
}

signed main(void) {
  ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  #ifdef LOCAL
    freopen("A.INP", "r", stdin);
    freopen("A.OUT", "w", stdout);
  #endif // LOCAL
  cin >> N >> M;
  for (int i = 0; i <= N + 1; ++i) {
    a[i][0] = a[i][M + 1] = 1;
  }
  for (int j = 0; j <= M + 1; ++j) {
    a[0][j] = a[N + 1][j] = 1;
  }
  for (int i = 1; i <= N; ++i) {
    for (int j = 1; j <= M; ++j) {
      rem[i + j]++;
    }
  }
  for (int i = 1; i <= N; ++i) {
    for (int j = 1; j <= M; ++j) {
      int x; cin >> x;
      if (x) gogo(i, j);
    }
  }
  int Q; cin >> Q;
  while (Q--) {
    int x, y; cin >> x >> y;
    if (a[x][y]) cout << "1\n";
    else {
      if (rem[x + y] == 1) {
        cout << "0\n";
      } else {
        cout << "1\n";
        gogo(x, y);
      }
    }
  }
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 640 KB Output is correct
2 Correct 1 ms 768 KB Output is correct
3 Correct 2 ms 768 KB Output is correct
4 Correct 3 ms 800 KB Output is correct
5 Correct 4 ms 896 KB Output is correct
6 Correct 3 ms 896 KB Output is correct
7 Correct 4 ms 896 KB Output is correct
8 Correct 3 ms 896 KB Output is correct
9 Correct 3 ms 896 KB Output is correct

Subtask #2
95.0 / 95.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 640 KB Output is correct
2 Correct 1 ms 768 KB Output is correct
3 Correct 2 ms 768 KB Output is correct
4 Correct 3 ms 800 KB Output is correct
5 Correct 4 ms 896 KB Output is correct
6 Correct 3 ms 896 KB Output is correct
7 Correct 4 ms 896 KB Output is correct
8 Correct 3 ms 896 KB Output is correct
9 Correct 3 ms 896 KB Output is correct
10 Correct 10 ms 896 KB Output is correct
11 Correct 3 ms 640 KB Output is correct
12 Correct 162 ms 8824 KB Output is correct
13 Correct 82 ms 6008 KB Output is correct
14 Correct 285 ms 13560 KB Output is correct
15 Correct 277 ms 13816 KB Output is correct
16 Correct 295 ms 14712 KB Output is correct
17 Correct 329 ms 15608 KB Output is correct
18 Correct 294 ms 15056 KB Output is correct
19 Correct 314 ms 15864 KB Output is correct
20 Correct 269 ms 15864 KB Output is correct
21 Correct 323 ms 15864 KB Output is correct