oj.uz

Submission #625633

# Submission time Handle Problem Language Result Execution time Memory
625633 2022-08-10T16:12:32 Z d4xn Radio Towers (IOI22_towers) C++17
27 / 100
 4000 ms 5864 KB 
#include "towers.h"
#include <bits/stdc++.h>
using namespace std;

//#define int long long
#define ll long long
#define vi vector<int>
#define ii pair<int, int>
#define vii vector<ii>

const int inf = INT_MAX;

int n, s1;
vi v, seg;

void build(int p=1, int l=0, int r=n-1) {
  if (l > r) return;
  if (l == r) {
    seg[p] = v[l];
    return;
  }

  int mid = (l+r)/2;
  build(p*2, l, mid);
  build(p*2+1, mid+1, r);
  seg[p] = max(seg[p*2], seg[p*2+1]);
}

int query(int a, int b, int p=1, int l=0, int r=n-1) {
  if (l > r || a > b || a > r || b < l) return -inf;
  if (a <= l && r <= b) {
    return seg[p];   
  }

  int mid = (l+r)/2;
  int x = query(a, b, p*2, l, mid);
  int y = query(a, b, p*2+1, mid+1, r);
  return max(x, y);
}

void init(int N, std::vector<int> H) {
  n = N;
  seg.resize(n*4);
  v.resize(n);
  for (int i = 0; i < n; i++) v[i] = H[i];
  build();

  s1 = -1;
  bool b = 1;
  for (int i = 1; i < n; i++) {
    if (v[i] > v[i-1]) continue;
    s1 = i-1;
    for (int j = i+1; j < n; j++) {
      if (v[j] > v[j-1]) {
        b = 0;
        break;
      }
    }
    break;
  }
  if (!b) s1 = -1;
  else if (b && s1 == -1) s1 = n-1;
}

int max_towers(int L, int R, int D) {
  int l = L;
  int r = R;
  int d = D;

  if (s1 != -1) {
    if (l <= s1 && s1 <= r) {
      return (max(v[l], v[r]) + d <= v[s1] ? 2 : 1);
    }
    return 1;
  }

  vii s(r-l+1);
  for (int i = l; i <= r; i++) {
    s[i-l] = make_pair(v[i], i);
  }
  sort(s.begin(), s.end());

  set<int> taken;
  for (int i = 0; i < r-l+1; i++) {
    int h = s[i].first;
    int idx = s[i].second;
    
    auto it = taken.upper_bound(idx);
    bool ok = 0;
    if (it != taken.end()) {
      int hi = *it;
      if (h + d <= query(idx+1, hi-1)) ok = 1;
    }
    else ok = 1;

    if (!ok) continue;

    ok = 0;
    if (it != taken.begin() && !taken.empty()) {
      --it;
      int lo = *it;
      if (h + d <= query(lo+1, idx-1)) ok = 1;
    }
    else ok = 1;

    if (ok) taken.insert(idx);
  }
  return taken.size();
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 300 ms 1948 KB Output is correct
2 Correct 928 ms 3024 KB Output is correct
3 Correct 666 ms 3004 KB Output is correct
4 Correct 894 ms 2968 KB Output is correct
5 Correct 736 ms 2996 KB Output is correct
6 Correct 736 ms 3024 KB Output is correct
7 Correct 643 ms 3024 KB Output is correct
8 Correct 0 ms 208 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 0 ms 336 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 0 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 0 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 1 ms 336 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 0 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 1 ms 336 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 1 ms 336 KB Output is correct
25 Correct 1 ms 208 KB Output is correct
26 Correct 1 ms 336 KB Output is correct
27 Correct 1 ms 336 KB Output is correct
28 Correct 1 ms 336 KB Output is correct
29 Correct 1 ms 336 KB Output is correct
30 Correct 1 ms 336 KB Output is correct
31 Correct 1 ms 336 KB Output is correct
32 Correct 1 ms 336 KB Output is correct
33 Correct 1 ms 336 KB Output is correct
34 Correct 1 ms 336 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 208 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 0 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 0 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 1 ms 336 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 0 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 1 ms 336 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 1 ms 336 KB Output is correct
25 Correct 1 ms 208 KB Output is correct
26 Correct 1 ms 336 KB Output is correct
27 Correct 1 ms 336 KB Output is correct
28 Correct 1 ms 336 KB Output is correct
29 Correct 1 ms 336 KB Output is correct
30 Correct 1 ms 336 KB Output is correct
31 Correct 1 ms 336 KB Output is correct
32 Correct 1 ms 336 KB Output is correct
33 Correct 1 ms 336 KB Output is correct
34 Correct 1 ms 336 KB Output is correct
35 Correct 1 ms 336 KB Output is correct
36 Correct 16 ms 2212 KB Output is correct
37 Correct 35 ms 3060 KB Output is correct
38 Correct 19 ms 3004 KB Output is correct
39 Correct 30 ms 2980 KB Output is correct
40 Correct 17 ms 2992 KB Output is correct
41 Correct 58 ms 4160 KB Output is correct
42 Correct 13 ms 3024 KB Output is correct
43 Correct 12 ms 2976 KB Output is correct
44 Correct 19 ms 3016 KB Output is correct
45 Correct 13 ms 2976 KB Output is correct
46 Correct 14 ms 3024 KB Output is correct
47 Correct 29 ms 3372 KB Output is correct
48 Correct 26 ms 3228 KB Output is correct
49 Correct 18 ms 3096 KB Output is correct
50 Correct 15 ms 2972 KB Output is correct
51 Correct 22 ms 2980 KB Output is correct
52 Correct 67 ms 4952 KB Output is correct
53 Correct 73 ms 5720 KB Output is correct
54 Correct 73 ms 5864 KB Output is correct
55 Correct 13 ms 2980 KB Output is correct
56 Correct 55 ms 3424 KB Output is correct
57 Correct 59 ms 3876 KB Output is correct
58 Correct 91 ms 4232 KB Output is correct
59 Correct 76 ms 4560 KB Output is correct
60 Correct 68 ms 5656 KB Output is correct
61 Correct 79 ms 5300 KB Output is correct
62 Correct 83 ms 4804 KB Output is correct
63 Correct 74 ms 5364 KB Output is correct
64 Correct 13 ms 2980 KB Output is correct
65 Correct 12 ms 2980 KB Output is correct
66 Correct 41 ms 3352 KB Output is correct
67 Correct 39 ms 3348 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4094 ms 5052 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 4006 ms 1508 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 208 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 0 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 0 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 1 ms 336 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 0 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 1 ms 336 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 1 ms 336 KB Output is correct
25 Correct 1 ms 208 KB Output is correct
26 Correct 1 ms 336 KB Output is correct
27 Correct 1 ms 336 KB Output is correct
28 Correct 1 ms 336 KB Output is correct
29 Correct 1 ms 336 KB Output is correct
30 Correct 1 ms 336 KB Output is correct
31 Correct 1 ms 336 KB Output is correct
32 Correct 1 ms 336 KB Output is correct
33 Correct 1 ms 336 KB Output is correct
34 Correct 1 ms 336 KB Output is correct
35 Correct 1 ms 336 KB Output is correct
36 Correct 16 ms 2212 KB Output is correct
37 Correct 35 ms 3060 KB Output is correct
38 Correct 19 ms 3004 KB Output is correct
39 Correct 30 ms 2980 KB Output is correct
40 Correct 17 ms 2992 KB Output is correct
41 Correct 58 ms 4160 KB Output is correct
42 Correct 13 ms 3024 KB Output is correct
43 Correct 12 ms 2976 KB Output is correct
44 Correct 19 ms 3016 KB Output is correct
45 Correct 13 ms 2976 KB Output is correct
46 Correct 14 ms 3024 KB Output is correct
47 Correct 29 ms 3372 KB Output is correct
48 Correct 26 ms 3228 KB Output is correct
49 Correct 18 ms 3096 KB Output is correct
50 Correct 15 ms 2972 KB Output is correct
51 Correct 22 ms 2980 KB Output is correct
52 Correct 67 ms 4952 KB Output is correct
53 Correct 73 ms 5720 KB Output is correct
54 Correct 73 ms 5864 KB Output is correct
55 Correct 13 ms 2980 KB Output is correct
56 Correct 55 ms 3424 KB Output is correct
57 Correct 59 ms 3876 KB Output is correct
58 Correct 91 ms 4232 KB Output is correct
59 Correct 76 ms 4560 KB Output is correct
60 Correct 68 ms 5656 KB Output is correct
61 Correct 79 ms 5300 KB Output is correct
62 Correct 83 ms 4804 KB Output is correct
63 Correct 74 ms 5364 KB Output is correct
64 Correct 13 ms 2980 KB Output is correct
65 Correct 12 ms 2980 KB Output is correct
66 Correct 41 ms 3352 KB Output is correct
67 Correct 39 ms 3348 KB Output is correct
68 Execution timed out 4094 ms 5052 KB Time limit exceeded
69 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 300 ms 1948 KB Output is correct
2 Correct 928 ms 3024 KB Output is correct
3 Correct 666 ms 3004 KB Output is correct
4 Correct 894 ms 2968 KB Output is correct
5 Correct 736 ms 2996 KB Output is correct
6 Correct 736 ms 3024 KB Output is correct
7 Correct 643 ms 3024 KB Output is correct
8 Correct 0 ms 208 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 0 ms 336 KB Output is correct
11 Correct 1 ms 208 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 1 ms 336 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 0 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 1 ms 336 KB Output is correct
22 Correct 0 ms 208 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 1 ms 336 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 1 ms 336 KB Output is correct
27 Correct 1 ms 336 KB Output is correct
28 Correct 0 ms 336 KB Output is correct
29 Correct 1 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 1 ms 336 KB Output is correct
33 Correct 1 ms 336 KB Output is correct
34 Correct 1 ms 336 KB Output is correct
35 Correct 1 ms 208 KB Output is correct
36 Correct 1 ms 336 KB Output is correct
37 Correct 1 ms 336 KB Output is correct
38 Correct 1 ms 336 KB Output is correct
39 Correct 1 ms 336 KB Output is correct
40 Correct 1 ms 336 KB Output is correct
41 Correct 1 ms 336 KB Output is correct
42 Correct 1 ms 336 KB Output is correct
43 Correct 1 ms 336 KB Output is correct
44 Correct 1 ms 336 KB Output is correct
45 Correct 1 ms 336 KB Output is correct
46 Correct 16 ms 2212 KB Output is correct
47 Correct 35 ms 3060 KB Output is correct
48 Correct 19 ms 3004 KB Output is correct
49 Correct 30 ms 2980 KB Output is correct
50 Correct 17 ms 2992 KB Output is correct
51 Correct 58 ms 4160 KB Output is correct
52 Correct 13 ms 3024 KB Output is correct
53 Correct 12 ms 2976 KB Output is correct
54 Correct 19 ms 3016 KB Output is correct
55 Correct 13 ms 2976 KB Output is correct
56 Correct 14 ms 3024 KB Output is correct
57 Correct 29 ms 3372 KB Output is correct
58 Correct 26 ms 3228 KB Output is correct
59 Correct 18 ms 3096 KB Output is correct
60 Correct 15 ms 2972 KB Output is correct
61 Correct 22 ms 2980 KB Output is correct
62 Correct 67 ms 4952 KB Output is correct
63 Correct 73 ms 5720 KB Output is correct
64 Correct 73 ms 5864 KB Output is correct
65 Correct 13 ms 2980 KB Output is correct
66 Correct 55 ms 3424 KB Output is correct
67 Correct 59 ms 3876 KB Output is correct
68 Correct 91 ms 4232 KB Output is correct
69 Correct 76 ms 4560 KB Output is correct
70 Correct 68 ms 5656 KB Output is correct
71 Correct 79 ms 5300 KB Output is correct
72 Correct 83 ms 4804 KB Output is correct
73 Correct 74 ms 5364 KB Output is correct
74 Correct 13 ms 2980 KB Output is correct
75 Correct 12 ms 2980 KB Output is correct
76 Correct 41 ms 3352 KB Output is correct
77 Correct 39 ms 3348 KB Output is correct
78 Execution timed out 4094 ms 5052 KB Time limit exceeded
79 Halted 0 ms 0 KB -