oj.uz

Submission #629926

# Submission time Handle Problem Language Result Execution time Memory
629926 2022-08-15T11:11:41 Z abeker Radio Towers (IOI22_towers) C++17
40 / 100
 4000 ms 173036 KB 
#include <bits/stdc++.h>
#include "towers.h"
using namespace std;

typedef pair <vector <int>, vector <int>> pvv;

const int INF = 2e9 + 5;

class Tournament {
  int offset;
  vector <int> tour;
public:
  Tournament(vector <int> vals) {
    for (offset = 1; offset < vals.size(); offset *= 2);
    tour.resize(2 * offset);
    for (int i = 0; i < offset; i++)
      tour[i + offset] = i < vals.size() ? vals[i] : INF;
    for (int i = offset - 1; i; i--)
      tour[i] = min(tour[2 * i], tour[2 * i + 1]);
  }
  Tournament() {}
  int query(int x, int lo, int hi, int from, int to) const {
    if (lo >= to || hi <= from)
      return INF;
    if (lo >= from && hi <= to)
      return tour[x];
    int mid = (lo + hi) / 2;
    return min(query(2 * x, lo, mid, from, to), query(2 * x + 1, mid, hi, from, to));
  }
  int query(int from, int to) const {
    return query(1, 0, offset, from, to);
  }
};

int N;
vector <int> H;
map <pair <int, int>, pvv> memo;

void init(int n, vector <int> h) {
  N = n;
  H = h;
}

int get_smaller(const vector <int> &v, int x) {
  return lower_bound(v.begin(), v.end(), x) - v.begin();
}

const pvv& calc(int l, int r) {
  pvv& ref = memo[{l, r}];
  if (!ref.first.empty() && !ref.second.empty())
    return ref;
  int n = r - l + 1;
  vector <int> h(n + 2);
  vector <int> lft(n + 1), rig(n + 1);
  h[0] = h[n + 1] = INF;
  for (int i = 1; i <= n; i++)
    h[i] = H[i + l - 1];
  Tournament solver(h);
  stack <int> s;
  s.push(0);
  for (int i = 1; i <= n; i++) {
    while (h[s.top()] < h[i])
      s.pop();
    lft[i] = s.top();
    s.push(i);
  }
  s = stack <int> ();
  s.push(n + 1);
  for (int i = n; i; i--) {
    while (h[s.top()] < h[i])
      s.pop();
    rig[i] = s.top();
    s.push(i);
  }
  for (int i = 1; i <= n; i++) {
    int tmp = solver.query(lft[i] + 1, rig[i]);
    ref.first.push_back(h[i] - tmp);
    ref.second.push_back(min(h[lft[i]], h[rig[i]]) - tmp);
  }
  sort(ref.first.begin(), ref.first.end());
  sort(ref.second.begin(), ref.second.end());
  return ref;
}

int max_towers(int l, int r, int d) {
  const pvv& ref = calc(l, r);
  return get_smaller(ref.first, d) - get_smaller(ref.second, d);
}

Compilation message

towers.cpp: In constructor 'Tournament::Tournament(std::vector<int>)':
towers.cpp:14:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |     for (offset = 1; offset < vals.size(); offset *= 2);
      |                      ~~~~~~~^~~~~~~~~~~~~
towers.cpp:17:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |       tour[i + offset] = i < vals.size() ? vals[i] : INF;
      |                          ~~^~~~~~~~~~~~~

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4100 ms 173036 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 208 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 208 KB Output is correct
9 Correct 0 ms 208 KB Output is correct
10 Correct 1 ms 208 KB Output is correct
11 Correct 1 ms 208 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 208 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 208 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 1 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 208 KB Output is correct
26 Correct 1 ms 388 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 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 392 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 208 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 208 KB Output is correct
9 Correct 0 ms 208 KB Output is correct
10 Correct 1 ms 208 KB Output is correct
11 Correct 1 ms 208 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 208 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 208 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 1 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 208 KB Output is correct
26 Correct 1 ms 388 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 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 392 KB Output is correct
36 Correct 12 ms 1488 KB Output is correct
37 Correct 29 ms 2584 KB Output is correct
38 Correct 14 ms 1480 KB Output is correct
39 Correct 24 ms 2052 KB Output is correct
40 Correct 13 ms 1444 KB Output is correct
41 Correct 33 ms 4252 KB Output is correct
42 Correct 11 ms 1460 KB Output is correct
43 Correct 21 ms 3108 KB Output is correct
44 Correct 12 ms 1480 KB Output is correct
45 Correct 11 ms 1452 KB Output is correct
46 Correct 17 ms 1432 KB Output is correct
47 Correct 27 ms 2632 KB Output is correct
48 Correct 16 ms 1924 KB Output is correct
49 Correct 12 ms 1352 KB Output is correct
50 Correct 19 ms 1940 KB Output is correct
51 Correct 19 ms 2888 KB Output is correct
52 Correct 47 ms 4488 KB Output is correct
53 Correct 36 ms 4508 KB Output is correct
54 Correct 45 ms 4460 KB Output is correct
55 Correct 32 ms 4416 KB Output is correct
56 Correct 40 ms 4776 KB Output is correct
57 Correct 36 ms 4444 KB Output is correct
58 Correct 46 ms 4416 KB Output is correct
59 Correct 51 ms 4500 KB Output is correct
60 Correct 46 ms 4496 KB Output is correct
61 Correct 35 ms 4416 KB Output is correct
62 Correct 38 ms 4504 KB Output is correct
63 Correct 35 ms 4500 KB Output is correct
64 Correct 31 ms 4884 KB Output is correct
65 Correct 38 ms 4376 KB Output is correct
66 Correct 39 ms 4684 KB Output is correct
67 Correct 34 ms 4476 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4081 ms 153232 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 307 ms 1360 KB Output is correct
2 Correct 772 ms 4440 KB Output is correct
3 Correct 785 ms 4504 KB Output is correct
4 Correct 854 ms 4528 KB Output is correct
5 Correct 985 ms 4444 KB Output is correct
6 Correct 1010 ms 4504 KB Output is correct
7 Correct 982 ms 4500 KB Output is correct
8 Correct 916 ms 5056 KB Output is correct
9 Correct 880 ms 4416 KB Output is correct
10 Correct 870 ms 4632 KB Output is correct
11 Correct 985 ms 4956 KB Output is correct
12 Correct 46 ms 4524 KB Output is correct
13 Correct 35 ms 4524 KB Output is correct
14 Correct 42 ms 4428 KB Output is correct
15 Correct 30 ms 4484 KB Output is correct
16 Correct 35 ms 4808 KB Output is correct
17 Correct 41 ms 4428 KB Output is correct
18 Correct 40 ms 4524 KB Output is correct
19 Correct 38 ms 4516 KB Output is correct
20 Correct 36 ms 4440 KB Output is correct
21 Correct 35 ms 4524 KB Output is correct
22 Correct 38 ms 4528 KB Output is correct
23 Correct 46 ms 4508 KB Output is correct
24 Correct 35 ms 4832 KB Output is correct
25 Correct 31 ms 4368 KB Output is correct
26 Correct 39 ms 4736 KB Output is correct
27 Correct 37 ms 4444 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 208 KB Output is correct
34 Correct 1 ms 336 KB Output is correct
35 Correct 1 ms 336 KB Output is correct
36 Correct 1 ms 464 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

Subtask #6
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 208 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 208 KB Output is correct
9 Correct 0 ms 208 KB Output is correct
10 Correct 1 ms 208 KB Output is correct
11 Correct 1 ms 208 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 208 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 208 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 1 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 208 KB Output is correct
26 Correct 1 ms 388 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 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 392 KB Output is correct
36 Correct 12 ms 1488 KB Output is correct
37 Correct 29 ms 2584 KB Output is correct
38 Correct 14 ms 1480 KB Output is correct
39 Correct 24 ms 2052 KB Output is correct
40 Correct 13 ms 1444 KB Output is correct
41 Correct 33 ms 4252 KB Output is correct
42 Correct 11 ms 1460 KB Output is correct
43 Correct 21 ms 3108 KB Output is correct
44 Correct 12 ms 1480 KB Output is correct
45 Correct 11 ms 1452 KB Output is correct
46 Correct 17 ms 1432 KB Output is correct
47 Correct 27 ms 2632 KB Output is correct
48 Correct 16 ms 1924 KB Output is correct
49 Correct 12 ms 1352 KB Output is correct
50 Correct 19 ms 1940 KB Output is correct
51 Correct 19 ms 2888 KB Output is correct
52 Correct 47 ms 4488 KB Output is correct
53 Correct 36 ms 4508 KB Output is correct
54 Correct 45 ms 4460 KB Output is correct
55 Correct 32 ms 4416 KB Output is correct
56 Correct 40 ms 4776 KB Output is correct
57 Correct 36 ms 4444 KB Output is correct
58 Correct 46 ms 4416 KB Output is correct
59 Correct 51 ms 4500 KB Output is correct
60 Correct 46 ms 4496 KB Output is correct
61 Correct 35 ms 4416 KB Output is correct
62 Correct 38 ms 4504 KB Output is correct
63 Correct 35 ms 4500 KB Output is correct
64 Correct 31 ms 4884 KB Output is correct
65 Correct 38 ms 4376 KB Output is correct
66 Correct 39 ms 4684 KB Output is correct
67 Correct 34 ms 4476 KB Output is correct
68 Execution timed out 4081 ms 153232 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 4100 ms 173036 KB Time limit exceeded
2 Halted 0 ms 0 KB -