oj.uz

Submission #754566

# Submission time Handle Problem Language Result Execution time Memory
754566 2023-06-08T05:30:54 Z boris_mihov Radio Towers (IOI22_towers) C++17
23 / 100
 4000 ms 10028 KB 
#include <algorithm>
#include <iostream>
#include <numeric>
#include <cassert>
#include <vector>
#include <stack>

typedef long long llong;
const int MAXLOG = 20 + 5;
const int MAXN = 100000 + 10;
const int INF  = 1e9;

int n;
struct Sparse
{
    int sparse[MAXLOG][MAXN];
    int lg[MAXN];

    void build(int _vals[])
    {
        for (int i = 1 ; i <= n ; ++i)
        {
            sparse[0][i] = _vals[i];
        }

        for (int log = 1 ; (1 << log) <= n ; ++log)
        {
            for (int i = 1 ; i + (1 << log) - 1 <= n ; ++i)
            {
                sparse[log][i] = std::max(sparse[log - 1][i], sparse[log - 1][i + (1 << log - 1)]);
            }
        }
    
        for (int i = 1 ; i <= n ; ++i)
        {
            lg[i] = lg[i - 1];
            if ((1 << lg[i] + 1) < i)
            {
                lg[i]++;
            }
        }
    }

    int findMAX(int l, int r)
    {
        int log = lg[r - l + 1];
        return std::max(sparse[log][l], sparse[log][r - (1 << log) + 1]);
    }
};

int a[MAXN];
int b[MAXN];
int c[MAXN];
int d[MAXN];
int h[MAXN];
Sparse sparse;
std::stack <int> st;

void init(int N, std::vector <int> H) 
{
    n = N;
    for (int i = 1 ; i <= n ; ++i)
    {
        h[i] = H[i - 1];
    }

    sparse.build(h);
    st.push(0);

    for (int i = 1 ; i <= n ; ++i)
    {
        while (h[st.top()] > h[i])
        {
            st.pop();
        }

        a[i] = st.top();
        st.push(i);
    }

    while (!st.empty())
    {
        st.pop();
    }

    st.push(n + 1);
    for (int i = n ; i >= 1 ; --i)
    {
        while (h[st.top()] > h[i])
        {
            st.pop();
        }

        c[i] = st.top();
        st.push(i);
    }

    for (int i = 1 ; i <= n ; ++i)
    {
        if (a[i] == i - 1)
        {
            b[i] = 0;
        } else
        {
            b[i] = sparse.findMAX(a[i] + 1, i - 1) - h[i];
        }

        if (c[i] == i + 1)
        {
            d[i] = 0;
        } else
        {
            d[i] = sparse.findMAX(i + 1, c[i] - 1) - h[i];
        }
    }
}

int max_towers(int L, int R, int D) 
{
    L++; R++;
    int ans = 0;
    for (int i = L ; i <= R ; ++i)
    {
        if ((a[i] < L || b[i] >= D) && (c[i] > R || d[i] >= D))
        {
            ans++;
        }
    }

    return ans;
}

Compilation message

towers.cpp: In member function 'void Sparse::build(int*)':
towers.cpp:30:93: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   30 |                 sparse[log][i] = std::max(sparse[log - 1][i], sparse[log - 1][i + (1 << log - 1)]);
      |                                                                                         ~~~~^~~
towers.cpp:37:29: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
   37 |             if ((1 << lg[i] + 1) < i)
      |                       ~~~~~~^~~

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1375 ms 5840 KB Output is correct
2 Execution timed out 4048 ms 9952 KB Time limit exceeded
3 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 1 ms 464 KB Output is correct
3 Correct 1 ms 464 KB Output is correct
4 Correct 2 ms 464 KB Output is correct
5 Correct 2 ms 464 KB Output is correct
6 Correct 1 ms 464 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 472 KB Output is correct
9 Correct 1 ms 472 KB Output is correct
10 Correct 1 ms 464 KB Output is correct
11 Correct 1 ms 464 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 464 KB Output is correct
14 Correct 1 ms 464 KB Output is correct
15 Correct 1 ms 464 KB Output is correct
16 Correct 1 ms 464 KB Output is correct
17 Correct 2 ms 468 KB Output is correct
18 Correct 1 ms 464 KB Output is correct
19 Correct 1 ms 464 KB Output is correct
20 Correct 1 ms 464 KB Output is correct
21 Correct 1 ms 464 KB Output is correct
22 Correct 1 ms 464 KB Output is correct
23 Correct 1 ms 464 KB Output is correct
24 Correct 1 ms 464 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 1 ms 464 KB Output is correct
27 Correct 1 ms 472 KB Output is correct
28 Correct 1 ms 464 KB Output is correct
29 Correct 1 ms 464 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 1 ms 468 KB Output is correct
32 Correct 1 ms 468 KB Output is correct
33 Correct 1 ms 464 KB Output is correct
34 Correct 1 ms 464 KB Output is correct
35 Correct 1 ms 464 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 1 ms 464 KB Output is correct
3 Correct 1 ms 464 KB Output is correct
4 Correct 2 ms 464 KB Output is correct
5 Correct 2 ms 464 KB Output is correct
6 Correct 1 ms 464 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 472 KB Output is correct
9 Correct 1 ms 472 KB Output is correct
10 Correct 1 ms 464 KB Output is correct
11 Correct 1 ms 464 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 464 KB Output is correct
14 Correct 1 ms 464 KB Output is correct
15 Correct 1 ms 464 KB Output is correct
16 Correct 1 ms 464 KB Output is correct
17 Correct 2 ms 468 KB Output is correct
18 Correct 1 ms 464 KB Output is correct
19 Correct 1 ms 464 KB Output is correct
20 Correct 1 ms 464 KB Output is correct
21 Correct 1 ms 464 KB Output is correct
22 Correct 1 ms 464 KB Output is correct
23 Correct 1 ms 464 KB Output is correct
24 Correct 1 ms 464 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 1 ms 464 KB Output is correct
27 Correct 1 ms 472 KB Output is correct
28 Correct 1 ms 464 KB Output is correct
29 Correct 1 ms 464 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 1 ms 468 KB Output is correct
32 Correct 1 ms 468 KB Output is correct
33 Correct 1 ms 464 KB Output is correct
34 Correct 1 ms 464 KB Output is correct
35 Correct 1 ms 464 KB Output is correct
36 Correct 20 ms 6176 KB Output is correct
37 Correct 28 ms 9532 KB Output is correct
38 Correct 21 ms 9544 KB Output is correct
39 Correct 20 ms 9496 KB Output is correct
40 Correct 28 ms 9504 KB Output is correct
41 Correct 20 ms 9524 KB Output is correct
42 Correct 19 ms 9512 KB Output is correct
43 Correct 18 ms 9928 KB Output is correct
44 Correct 19 ms 9952 KB Output is correct
45 Correct 19 ms 9752 KB Output is correct
46 Correct 19 ms 9768 KB Output is correct
47 Correct 28 ms 9544 KB Output is correct
48 Correct 26 ms 9512 KB Output is correct
49 Correct 19 ms 9588 KB Output is correct
50 Correct 26 ms 9916 KB Output is correct
51 Correct 17 ms 9928 KB Output is correct
52 Correct 28 ms 9528 KB Output is correct
53 Correct 34 ms 9516 KB Output is correct
54 Correct 28 ms 9496 KB Output is correct
55 Correct 18 ms 10028 KB Output is correct
56 Correct 18 ms 9768 KB Output is correct
57 Correct 21 ms 9268 KB Output is correct
58 Correct 30 ms 9504 KB Output is correct
59 Correct 21 ms 9508 KB Output is correct
60 Correct 19 ms 9516 KB Output is correct
61 Correct 19 ms 9544 KB Output is correct
62 Correct 22 ms 9508 KB Output is correct
63 Correct 28 ms 9508 KB Output is correct
64 Correct 18 ms 10008 KB Output is correct
65 Correct 21 ms 9928 KB Output is correct
66 Correct 25 ms 9792 KB Output is correct
67 Correct 19 ms 9896 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4030 ms 9516 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 3111 ms 2352 KB Output is correct
2 Execution timed out 4027 ms 9588 KB Time limit exceeded
3 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 1 ms 464 KB Output is correct
3 Correct 1 ms 464 KB Output is correct
4 Correct 2 ms 464 KB Output is correct
5 Correct 2 ms 464 KB Output is correct
6 Correct 1 ms 464 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 472 KB Output is correct
9 Correct 1 ms 472 KB Output is correct
10 Correct 1 ms 464 KB Output is correct
11 Correct 1 ms 464 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 464 KB Output is correct
14 Correct 1 ms 464 KB Output is correct
15 Correct 1 ms 464 KB Output is correct
16 Correct 1 ms 464 KB Output is correct
17 Correct 2 ms 468 KB Output is correct
18 Correct 1 ms 464 KB Output is correct
19 Correct 1 ms 464 KB Output is correct
20 Correct 1 ms 464 KB Output is correct
21 Correct 1 ms 464 KB Output is correct
22 Correct 1 ms 464 KB Output is correct
23 Correct 1 ms 464 KB Output is correct
24 Correct 1 ms 464 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 1 ms 464 KB Output is correct
27 Correct 1 ms 472 KB Output is correct
28 Correct 1 ms 464 KB Output is correct
29 Correct 1 ms 464 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 1 ms 468 KB Output is correct
32 Correct 1 ms 468 KB Output is correct
33 Correct 1 ms 464 KB Output is correct
34 Correct 1 ms 464 KB Output is correct
35 Correct 1 ms 464 KB Output is correct
36 Correct 20 ms 6176 KB Output is correct
37 Correct 28 ms 9532 KB Output is correct
38 Correct 21 ms 9544 KB Output is correct
39 Correct 20 ms 9496 KB Output is correct
40 Correct 28 ms 9504 KB Output is correct
41 Correct 20 ms 9524 KB Output is correct
42 Correct 19 ms 9512 KB Output is correct
43 Correct 18 ms 9928 KB Output is correct
44 Correct 19 ms 9952 KB Output is correct
45 Correct 19 ms 9752 KB Output is correct
46 Correct 19 ms 9768 KB Output is correct
47 Correct 28 ms 9544 KB Output is correct
48 Correct 26 ms 9512 KB Output is correct
49 Correct 19 ms 9588 KB Output is correct
50 Correct 26 ms 9916 KB Output is correct
51 Correct 17 ms 9928 KB Output is correct
52 Correct 28 ms 9528 KB Output is correct
53 Correct 34 ms 9516 KB Output is correct
54 Correct 28 ms 9496 KB Output is correct
55 Correct 18 ms 10028 KB Output is correct
56 Correct 18 ms 9768 KB Output is correct
57 Correct 21 ms 9268 KB Output is correct
58 Correct 30 ms 9504 KB Output is correct
59 Correct 21 ms 9508 KB Output is correct
60 Correct 19 ms 9516 KB Output is correct
61 Correct 19 ms 9544 KB Output is correct
62 Correct 22 ms 9508 KB Output is correct
63 Correct 28 ms 9508 KB Output is correct
64 Correct 18 ms 10008 KB Output is correct
65 Correct 21 ms 9928 KB Output is correct
66 Correct 25 ms 9792 KB Output is correct
67 Correct 19 ms 9896 KB Output is correct
68 Execution timed out 4030 ms 9516 KB Time limit exceeded
69 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1375 ms 5840 KB Output is correct
2 Execution timed out 4048 ms 9952 KB Time limit exceeded
3 Halted 0 ms 0 KB -