oj.uz

Submission #292579

# Submission time Handle Problem Language Result Execution time Memory
292579 2020-09-07T10:05:53 Z model_code Furniture (JOI20_furniture) C++17
100 / 100
 3450 ms 6700 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 4 ms 512 KB Output is correct
2 Correct 11 ms 384 KB Output is correct
3 Correct 14 ms 384 KB Output is correct
4 Correct 26 ms 432 KB Output is correct
5 Correct 31 ms 512 KB Output is correct
6 Correct 33 ms 384 KB Output is correct
7 Correct 32 ms 384 KB Output is correct
8 Correct 33 ms 384 KB Output is correct
9 Correct 32 ms 384 KB Output is correct

Subtask #2
95.0 / 95.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 512 KB Output is correct
2 Correct 11 ms 384 KB Output is correct
3 Correct 14 ms 384 KB Output is correct
4 Correct 26 ms 432 KB Output is correct
5 Correct 31 ms 512 KB Output is correct
6 Correct 33 ms 384 KB Output is correct
7 Correct 32 ms 384 KB Output is correct
8 Correct 33 ms 384 KB Output is correct
9 Correct 32 ms 384 KB Output is correct
10 Correct 97 ms 640 KB Output is correct
11 Correct 21 ms 384 KB Output is correct
12 Correct 1240 ms 4728 KB Output is correct
13 Correct 290 ms 3964 KB Output is correct
14 Correct 2874 ms 5660 KB Output is correct
15 Correct 2961 ms 5468 KB Output is correct
16 Correct 3275 ms 5932 KB Output is correct
17 Correct 3425 ms 6124 KB Output is correct
18 Correct 3324 ms 6352 KB Output is correct
19 Correct 3426 ms 6600 KB Output is correct
20 Correct 3353 ms 6504 KB Output is correct
21 Correct 3450 ms 6700 KB Output is correct