oj.uz

Submission #972980

# Submission time Handle Problem Language Result Execution time Memory
972980 2024-05-01T11:09:31 Z MilosMilutinovic UFO (IZhO14_ufo) C++14
100 / 100
 905 ms 173296 KB 
#include <bits/stdc++.h>
 
using namespace std;

struct segtree {
  vector<int> mx;
  segtree() {}
  segtree(int n) : mx(4 * n) {}
  void modify(int id, int l, int r, int i, int v) {
    if (l == r) {
      mx[id] += v;
      return;
    }
    int mid = (l + r) >> 1;
    if (i <= mid) {
      modify(id << 1, l, mid, i, v);
    } else {
      modify(id << 1 | 1, mid + 1, r, i, v);
    }
    mx[id] = max(mx[id << 1], mx[id << 1 | 1]);
  }
  int find_first(int id, int l, int r, int i, int v) {
    if (r < i || mx[id] < v) {
      return -1;
    }
    if (l == r) {
      return l;
    }
    int mid = (l + r) / 2;
    int f = find_first(id << 1, l, mid, i, v);
    if (f != -1) {
      return f;
    } else {
      return find_first(id << 1 | 1, mid + 1, r, i, v);
    }
  }
};
 
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, m, r, k, p;
  cin >> n >> m >> r >> k >> p;
  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];
    }
  }
  vector<vector<segtree>> st(4);
  st[0] = vector<segtree>(n, segtree(m));
  st[1] = vector<segtree>(n, segtree(m));
  st[2] = vector<segtree>(m, segtree(n));
  st[3] = vector<segtree>(m, segtree(n));
  vector<vector<int>> b(n, vector<int>(m));
  auto Update = [&](int i, int j, int v) {
    st[0][i].modify(1, 0, m - 1, j, v);
    st[1][i].modify(1, 0, m - 1, m - 1 - j, v);
    st[2][j].modify(1, 0, n - 1, i, v);
    st[3][j].modify(1, 0, n - 1, n - 1 - i, v);
    b[i][j] += v;
  };
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < m; j++) {
      Update(i, j, a[i][j]);
    }
  }
  while (k--) {
    char op;
    cin >> op;
    if (op == 'W') {
      int i, h;
      cin >> i >> h;
      --i;
      int lst = 0;
      for (int it = 0; it < r && lst < m; it++) {
        int j = st[0][i].find_first(1, 0, m - 1, lst, h);
        if (j == -1) {
          break;
        }
        Update(i, j, -1);
        lst = j + 1;
      }
    }
    if (op == 'E') {
      int i, h;
      cin >> i >> h;
      --i;
      int lst = 0;
      for (int it = 0; it < r && lst < m; it++) {
        int j = st[1][i].find_first(1, 0, m - 1, lst, h);
        if (j == -1) {
          break;
        }
        Update(i, m - 1 - j, -1);
        lst = j + 1;
      }
    }
    if (op == 'N') {
      int j, h;
      cin >> j >> h;
      --j;
      int lst = 0;
      for (int it = 0; it < r && lst < n; it++) {
        int i = st[2][j].find_first(1, 0, n - 1, lst, h);
        if (i == -1) {
          break;
        }
        Update(i, j, -1);
        lst = i + 1;
      }
    }
    if (op == 'S') {
      int j, h;
      cin >> j >> h;
      --j;
      int lst = 0;
      for (int it = 0; it < r && lst < n; it++) {
        int i = st[3][j].find_first(1, 0, n - 1, lst, h);
        if (i == -1) {
          break;
        }
        Update(n - 1 - i, j, -1);
        lst = i + 1;
      }
    }
  }
  vector<vector<long long>> sum(n, vector<long long>(m));
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < m; j++) {
      sum[i][j] = b[i][j];
      if (i > 0) {
        sum[i][j] += sum[i - 1][j];
      }
      if (j > 0) {
        sum[i][j] += sum[i][j - 1];
      }
      if (i > 0 && j > 0) {
        sum[i][j] -= sum[i - 1][j - 1];
      }
    }
  }
  auto Query = [&](int x1, int y1, int x2, int y2) {
    long long res = sum[x2][y2];
    if (x1 > 0) {
      res -= sum[x1 - 1][y2];
    }
    if (y1 > 0) {
      res -= sum[x2][y1 - 1];
    }
    if (x1 > 0 && y1 > 0) {
      res += sum[x1 - 1][y1 - 1];
    }
    return res;
  };
  long long ans = 0;
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < m; j++) {
      ans = max(ans, Query(max(0, i - p + 1), max(0, j - p + 1), i, j));
    }
  }
  cout << ans << '\n';
  return 0;
}

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 1 ms 472 KB Output is correct
4 Correct 13 ms 1316 KB Output is correct
5 Correct 90 ms 5460 KB Output is correct
6 Correct 256 ms 42156 KB Output is correct
7 Correct 341 ms 95600 KB Output is correct
8 Correct 290 ms 92096 KB Output is correct
9 Correct 648 ms 86780 KB Output is correct
10 Correct 672 ms 91048 KB Output is correct
11 Correct 497 ms 89380 KB Output is correct
12 Correct 664 ms 91304 KB Output is correct
13 Correct 757 ms 101000 KB Output is correct
14 Correct 573 ms 89640 KB Output is correct
15 Correct 638 ms 92724 KB Output is correct
16 Correct 296 ms 92004 KB Output is correct
17 Correct 905 ms 105764 KB Output is correct
18 Correct 269 ms 94872 KB Output is correct
19 Correct 379 ms 101776 KB Output is correct
20 Correct 883 ms 173296 KB Output is correct