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Submission #735348

# Submission time Handle Problem Language Result Execution time Memory
735348 2023-05-04T03:14:05 Z math_rabbit_1028 Radio Towers (IOI22_towers) C++17
23 / 100
 4000 ms 5788 KB 
#include "towers.h"
#include <bits/stdc++.h>
using namespace std;

int n;
vector<int> arr;
int sort_index[101010];


struct maxseg {
  int tree[404040];
  vector<int> initarr;
  void init(int v, int st, int ed) {
    if (st == ed) {
      tree[v] = initarr[st];
      return;
    }
    int mid = (st + ed) / 2;
    init(2 * v, st, mid);
    init(2 * v + 1, mid + 1, ed);
    tree[v] = max(tree[2 * v], tree[2 * v + 1]);
  }
  void update(int v, int st, int ed, int idx, int val) {
    if (idx < st || idx > ed) return;
    if (idx == st && idx == ed) {
      tree[v] = val;
      return;
    }
    int mid = (st + ed) / 2;
    update(2 * v, st, mid, idx, val);
    update(2 * v + 1, mid + 1, ed, idx, val);
    tree[v] = max(tree[2 * v], tree[2 * v + 1]);
  }
  int get(int v, int st, int ed, int gs, int ge) {
    if (st > ge || ed < gs) return -1;
    if (gs <= st && ed <= ge) return tree[v];
    int mid = (st + ed) / 2;
    return max(get(2 * v, st, mid, gs, ge), get(2 * v + 1, mid + 1, ed, gs, ge));
  }
} max_value, left_index;

struct minseg {
  int tree[404040];
  vector<int> initarr;
  void init(int v, int st, int ed) {
    if (st == ed) {
      tree[v] = initarr[st];
      return;
    }
    int mid = (st + ed) / 2;
    init(2 * v, st, mid);
    init(2 * v + 1, mid + 1, ed);
    tree[v] = min(tree[2 * v], tree[2 * v + 1]);
  }
  void update(int v, int st, int ed, int idx, int val) {
    if (idx < st || idx > ed) return;
    if (idx == st && idx == ed) {
      tree[v] = val;
      return;
    }
    int mid = (st + ed) / 2;
    update(2 * v, st, mid, idx, val);
    update(2 * v + 1, mid + 1, ed, idx, val);
    tree[v] = min(tree[2 * v], tree[2 * v + 1]);
  }
  int get(int v, int st, int ed, int gs, int ge) {
    if (st > ge || ed < gs) return n;
    if (gs <= st && ed <= ge) return tree[v];
    int mid = (st + ed) / 2;
    return min(get(2 * v, st, mid, gs, ge), get(2 * v + 1, mid + 1, ed, gs, ge));
  }
} right_index;

void init(int N, vector<int> H) {
  n = N;
  vector< pair<int, int> > temp;
  for (int i = 0; i < N; i++) arr.push_back(H[i]);
  for (int i = 0; i < N; i++) temp.push_back({H[i], i});
  sort(temp.begin(), temp.end());
  for (int i = 0; i < N; i++) {
    sort_index[i] = temp[i].second;
  }
  max_value.initarr = arr;
  right_index.initarr = vector<int>(n, n);
  left_index.initarr = vector<int>(n, -1);
  max_value.init(1, 0, n - 1);
}


int max_towers(int L, int R, int D) {
  int ans = 0;
  left_index.init(1, 0, n - 1);
  right_index.init(1, 0, n - 1);

  for (int i = 0; i < n; i++) {
    if (sort_index[i] < L || sort_index[i] > R) continue;
    bool f = true;

    int j = right_index.get(1, 0, n - 1, sort_index[i] + 1, R);
    //cout << sort_index[i] << " " << j << "\n";
    if (j >= 0 && j < n)
      if (max_value.get(1, 0, n - 1, sort_index[i] + 1, j - 1) < max(arr[sort_index[i]], arr[j]) + D) 
        f = false;
    j = left_index.get(1, 0, n - 1, L, sort_index[i] - 1);
    //cout << j << " " << sort_index[i] << "\n";  
    if (j >= 0 && j < n)
      if (max_value.get(1, 0, n - 1, j + 1, sort_index[i] - 1) < max(arr[sort_index[i]], arr[j]) + D) 
        f = false;

    if (f) {
      ans++;
      left_index.update(1, 0, n - 1, sort_index[i], sort_index[i]);
      right_index.update(1, 0, n - 1, sort_index[i], sort_index[i]);
    }
  }
  return ans;
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4030 ms 3316 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 2 ms 336 KB Output is correct
3 Correct 2 ms 452 KB Output is correct
4 Correct 2 ms 336 KB Output is correct
5 Correct 2 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 452 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 208 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 2 ms 336 KB Output is correct
16 Correct 2 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 2 ms 336 KB Output is correct
21 Correct 2 ms 336 KB Output is correct
22 Correct 2 ms 336 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 2 ms 336 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 2 ms 336 KB Output is correct
27 Correct 3 ms 456 KB Output is correct
28 Correct 2 ms 336 KB Output is correct
29 Correct 2 ms 336 KB Output is correct
30 Correct 2 ms 336 KB Output is correct
31 Correct 2 ms 336 KB Output is correct
32 Correct 2 ms 336 KB Output is correct
33 Correct 2 ms 336 KB Output is correct
34 Correct 2 ms 452 KB Output is correct
35 Correct 1 ms 336 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 2 ms 336 KB Output is correct
3 Correct 2 ms 452 KB Output is correct
4 Correct 2 ms 336 KB Output is correct
5 Correct 2 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 452 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 208 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 2 ms 336 KB Output is correct
16 Correct 2 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 2 ms 336 KB Output is correct
21 Correct 2 ms 336 KB Output is correct
22 Correct 2 ms 336 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 2 ms 336 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 2 ms 336 KB Output is correct
27 Correct 3 ms 456 KB Output is correct
28 Correct 2 ms 336 KB Output is correct
29 Correct 2 ms 336 KB Output is correct
30 Correct 2 ms 336 KB Output is correct
31 Correct 2 ms 336 KB Output is correct
32 Correct 2 ms 336 KB Output is correct
33 Correct 2 ms 336 KB Output is correct
34 Correct 2 ms 452 KB Output is correct
35 Correct 1 ms 336 KB Output is correct
36 Correct 35 ms 3384 KB Output is correct
37 Correct 60 ms 5740 KB Output is correct
38 Correct 38 ms 5660 KB Output is correct
39 Correct 59 ms 5740 KB Output is correct
40 Correct 36 ms 5744 KB Output is correct
41 Correct 123 ms 5664 KB Output is correct
42 Correct 29 ms 5668 KB Output is correct
43 Correct 46 ms 5736 KB Output is correct
44 Correct 30 ms 5676 KB Output is correct
45 Correct 23 ms 5788 KB Output is correct
46 Correct 20 ms 5660 KB Output is correct
47 Correct 59 ms 5724 KB Output is correct
48 Correct 46 ms 5744 KB Output is correct
49 Correct 33 ms 5724 KB Output is correct
50 Correct 40 ms 5668 KB Output is correct
51 Correct 48 ms 5668 KB Output is correct
52 Correct 105 ms 5664 KB Output is correct
53 Correct 130 ms 5740 KB Output is correct
54 Correct 117 ms 5740 KB Output is correct
55 Correct 59 ms 5744 KB Output is correct
56 Correct 68 ms 5744 KB Output is correct
57 Correct 94 ms 5572 KB Output is correct
58 Correct 109 ms 5660 KB Output is correct
59 Correct 101 ms 5780 KB Output is correct
60 Correct 131 ms 5744 KB Output is correct
61 Correct 106 ms 5748 KB Output is correct
62 Correct 104 ms 5664 KB Output is correct
63 Correct 106 ms 5748 KB Output is correct
64 Correct 53 ms 5704 KB Output is correct
65 Correct 56 ms 5660 KB Output is correct
66 Correct 71 ms 5656 KB Output is correct
67 Correct 52 ms 5648 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4086 ms 5724 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4011 ms 1744 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 2 ms 336 KB Output is correct
3 Correct 2 ms 452 KB Output is correct
4 Correct 2 ms 336 KB Output is correct
5 Correct 2 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 452 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 208 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 2 ms 336 KB Output is correct
16 Correct 2 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 2 ms 336 KB Output is correct
21 Correct 2 ms 336 KB Output is correct
22 Correct 2 ms 336 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 2 ms 336 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 2 ms 336 KB Output is correct
27 Correct 3 ms 456 KB Output is correct
28 Correct 2 ms 336 KB Output is correct
29 Correct 2 ms 336 KB Output is correct
30 Correct 2 ms 336 KB Output is correct
31 Correct 2 ms 336 KB Output is correct
32 Correct 2 ms 336 KB Output is correct
33 Correct 2 ms 336 KB Output is correct
34 Correct 2 ms 452 KB Output is correct
35 Correct 1 ms 336 KB Output is correct
36 Correct 35 ms 3384 KB Output is correct
37 Correct 60 ms 5740 KB Output is correct
38 Correct 38 ms 5660 KB Output is correct
39 Correct 59 ms 5740 KB Output is correct
40 Correct 36 ms 5744 KB Output is correct
41 Correct 123 ms 5664 KB Output is correct
42 Correct 29 ms 5668 KB Output is correct
43 Correct 46 ms 5736 KB Output is correct
44 Correct 30 ms 5676 KB Output is correct
45 Correct 23 ms 5788 KB Output is correct
46 Correct 20 ms 5660 KB Output is correct
47 Correct 59 ms 5724 KB Output is correct
48 Correct 46 ms 5744 KB Output is correct
49 Correct 33 ms 5724 KB Output is correct
50 Correct 40 ms 5668 KB Output is correct
51 Correct 48 ms 5668 KB Output is correct
52 Correct 105 ms 5664 KB Output is correct
53 Correct 130 ms 5740 KB Output is correct
54 Correct 117 ms 5740 KB Output is correct
55 Correct 59 ms 5744 KB Output is correct
56 Correct 68 ms 5744 KB Output is correct
57 Correct 94 ms 5572 KB Output is correct
58 Correct 109 ms 5660 KB Output is correct
59 Correct 101 ms 5780 KB Output is correct
60 Correct 131 ms 5744 KB Output is correct
61 Correct 106 ms 5748 KB Output is correct
62 Correct 104 ms 5664 KB Output is correct
63 Correct 106 ms 5748 KB Output is correct
64 Correct 53 ms 5704 KB Output is correct
65 Correct 56 ms 5660 KB Output is correct
66 Correct 71 ms 5656 KB Output is correct
67 Correct 52 ms 5648 KB Output is correct
68 Execution timed out 4086 ms 5724 KB Time limit exceeded
69 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4030 ms 3316 KB Time limit exceeded
2 Halted 0 ms 0 KB -