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Submission #994487

# Submission time Handle Problem Language Result Execution time Memory
994487 2024-06-07T17:45:31 Z tch1cherin Luxury burrow (IZhO13_burrow) C++17
100 / 100
 317 ms 21884 KB 
#include <bits/stdc++.h>
using namespace std;

int main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  int N, M, K;
  cin >> N >> M >> K;
  vector<vector<int>> A(N, vector<int>(M));
  vector<int> sorted_vals(N * M);
  for (int i = 0; i < N; i++) {
    for (int j = 0; j < M; j++) {
      cin >> A[i][j];
      sorted_vals[i * M + j] = A[i][j];
    }
  }
  sort(sorted_vals.begin(), sorted_vals.end());
  vector<vector<int>> up(N, vector<int>(M));
  vector<int> prv(M), nxt(M);
  int L = -1, R = (int)sorted_vals.size();
  int area;
  while (R - L > 1) {
    int mid = (L + R) / 2;
    int pivot = sorted_vals[mid];
    int max_area = 0;
    for (int i = 0; i < N; i++) {
      for (int j = 0; j < M; j++) {
        up[i][j] = (A[i][j] >= pivot ? (i > 0 ? up[i - 1][j] : 0) + 1 : 0);
      }
      for (int j = 0; j < M; j++) {
        prv[j] = j - 1;
        while (prv[j] >= 0 && up[i][prv[j]] > up[i][j]) {
          prv[j] = prv[prv[j]];
        }
      }
      for (int j = M - 1; j >= 0; j--) {
        nxt[j] = j + 1;
        while (nxt[j] < M && up[i][nxt[j]] >= up[i][j]) {
          nxt[j] = nxt[nxt[j]];
        }
        max_area = max(max_area, (nxt[j] - prv[j] - 1) * up[i][j]);
      }
    }
    if (max_area >= K) {
      L = mid;
      area = max_area;
    } else {
      R = mid;
    }
  }
  cout << sorted_vals[L] << " " << area << "\n";
}

Compilation message

burrow.cpp: In function 'int main()':
burrow.cpp:50:44: warning: 'area' may be used uninitialized in this function [-Wmaybe-uninitialized]
   50 |   cout << sorted_vals[L] << " " << area << "\n";
      |                                            ^~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 3 ms 604 KB Output is correct
9 Correct 5 ms 604 KB Output is correct
10 Correct 12 ms 1104 KB Output is correct
11 Correct 19 ms 1588 KB Output is correct
12 Correct 14 ms 1116 KB Output is correct
13 Correct 19 ms 1372 KB Output is correct
14 Correct 41 ms 2952 KB Output is correct
15 Correct 50 ms 2908 KB Output is correct
16 Correct 46 ms 3420 KB Output is correct
17 Correct 49 ms 3932 KB Output is correct
18 Correct 110 ms 7508 KB Output is correct
19 Correct 172 ms 8020 KB Output is correct
20 Correct 237 ms 13396 KB Output is correct
21 Correct 248 ms 16212 KB Output is correct
22 Correct 309 ms 21884 KB Output is correct
23 Correct 317 ms 21724 KB Output is correct
24 Correct 238 ms 12116 KB Output is correct
25 Correct 264 ms 15080 KB Output is correct