Submission #1055539

#	Time	Username	Problem	Language	Result	Execution time	Memory
1055539		MilosMilutinovic	Sandcastle 2 (JOI22_ho_t5)	C++14	10 / 100	5090 ms	920 KiB

Main

#include <bits/stdc++.h>

using namespace std;

const int dx[] = {1, -1, 0, 0};
const int dy[] = {0, 0, 1, -1};

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, m;
  cin >> n >> m;
  vector<vector<int>> a(n, vector<int>(m));
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < m; j++) {
      cin >> a[i][j];
    }
  }
  int res = 0;
  for (int x1 = 0; x1 < n; x1++) {
    for (int y1 = 0; y1 < m; y1++) {
      for (int x2 = x1; x2 < n; x2++) {
        for (int y2 = y1; y2 < m; y2++) {
          auto Valid = [&](int x, int y) {
            return x1 <= x && x <= x2 && y1 <= y && y <= y2;
          };
          long long s = 0;
          int ft = 0;
          for (int i = x1; i <= x2; i++) {
            for (int j = y1; j <= y2; j++) {
              ft = max(ft, a[i][j]);
              int mx = 0;
              for (int d = 0; d < 4; d++) {
                int ni = i + dx[d];
                int nj = j + dy[d];
                if (Valid(ni, nj) && a[i][j] > a[ni][nj]) {
                  mx = max(mx, a[ni][nj]);
                }
              }
              s += mx;
              s -= a[i][j];
            }
          }
          if (s == -ft) {
            res += 1;
          }
        }
      }
    }
  }
  cout << res << '\n';
  return 0;
}

• Subtask 1: 0 / 9
• Subtask 2: 10 / 10
• Subtask 3: 0 / 5
• Subtask 4: 0 / 56
• Subtask 5: 0 / 20