oj.uz

Submission #293281

# Submission time Handle Problem Language Result Execution time Memory
293281 2020-09-07T20:21:18 Z fake_account Furniture (JOI20_furniture) C++14
100 / 100
 3429 ms 6776 KB 
#include <iostream>
#include <stack>
#include <utility>
#include <vector>
 
int main() {
  int N, M;
  std::cin >> N >> M;
 
  std::vector<std::vector<int>> R(N + 2, std::vector<int>(M + 2, 1));
  std::vector<int> L(N + M + 1, 0);
  for (int i = 1; i <= N; ++i) {
    for (int j = 1; j <= M; ++j) {
      R[i][j] = 0;
      ++L[i + j];
    }
  }
 
  const auto set = [&](const int X, const int Y) -> int {
    if (R[X][Y] == 1) {
      return 1;
    }
    if (L[X + Y] == 1) {
      return 0;
    }
    std::stack<std::pair<int, int>> st;
    const auto push = [&](const int x, const int y) {
      if (R[x][y] == 0) {
        R[x][y] = 1;
        --L[x + y];
        st.emplace(x, y);
      }
    };
    push(X, Y);
    while (!st.empty()) {
      const int x = st.top().first;
      const int y = st.top().second;
      st.pop();
      if (R[x - 1][y + 1] == 1) {
        push(x - 1, y);
        push(x, y + 1);
      }
      if (R[x + 1][y - 1] == 1) {
        push(x, y - 1);
        push(x + 1, y);
      }
    }
    return 1;
  };
 
  for (int i = 1; i <= N; ++i) {
    for (int j = 1; j <= M; ++j) {
      int C;
      std::cin >> C;
      if (C == 1) {
        set(i, j);
      }
    }
  }
 
  int Q;
  std::cin >> Q;
  for (int k = 1; k <= Q; ++k) {
    int X, Y;
    std::cin >> X >> Y;
    std::cout << set(X, Y) << "\n";
  }
 
  return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 12 ms 384 KB Output is correct
3 Correct 14 ms 384 KB Output is correct
4 Correct 25 ms 512 KB Output is correct
5 Correct 27 ms 384 KB Output is correct
6 Correct 32 ms 384 KB Output is correct
7 Correct 32 ms 428 KB Output is correct
8 Correct 32 ms 384 KB Output is correct
9 Correct 33 ms 416 KB Output is correct

Subtask #2
95.0 / 95.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 12 ms 384 KB Output is correct
3 Correct 14 ms 384 KB Output is correct
4 Correct 25 ms 512 KB Output is correct
5 Correct 27 ms 384 KB Output is correct
6 Correct 32 ms 384 KB Output is correct
7 Correct 32 ms 428 KB Output is correct
8 Correct 32 ms 384 KB Output is correct
9 Correct 33 ms 416 KB Output is correct
10 Correct 89 ms 632 KB Output is correct
11 Correct 20 ms 384 KB Output is correct
12 Correct 1223 ms 4732 KB Output is correct
13 Correct 295 ms 3840 KB Output is correct
14 Correct 2814 ms 5592 KB Output is correct
15 Correct 2918 ms 5496 KB Output is correct
16 Correct 3165 ms 6264 KB Output is correct
17 Correct 3316 ms 6280 KB Output is correct
18 Correct 3275 ms 6216 KB Output is correct
19 Correct 3429 ms 6492 KB Output is correct
20 Correct 3351 ms 6776 KB Output is correct
21 Correct 3422 ms 6392 KB Output is correct