oj.uz

Submission #836219

# Submission time Handle Problem Language Result Execution time Memory
836219 2023-08-24T08:55:55 Z tengiz05 Radio Towers (IOI22_towers) C++17
0 / 100
 4000 ms 2736 KB 
#include "towers.h"

#include <bits/stdc++.h>
using namespace std;

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

int max_towers(int l, int r, int D) {
    vector<int> dp(n);
    deque<pair<int, int>> st;
    vector<int> nxt(n, -1);
    for (int i = n - 1; i >= 0; i--) {
        while (!st.empty() && h[st.front().second] <= h[i]) st.pop_front();
        st.push_front({h[i], i});
        auto p = lower_bound(st.begin(), st.end(), pair{h[i] + D, -1});
        if (p != st.end()) {
            nxt[i] = p->second;
        }
    }
    st.clear();
    vector<int> prev(n, -1);
    for (int i = 0; i < n; i++) {
        while (!st.empty() && h[st.front().second] <= h[i]) st.pop_front();
        st.push_front({h[i], i});
        auto p = lower_bound(st.begin(), st.end(), pair{h[i] + D, -1});
        if (p != st.end()) {
            prev[i] = p->second;
        }
    }
    for (int i = l; i <= r; i++) {
        dp[i] = 1;
        for (int j = l; j < i; j++) {
            if (nxt[j] < i && prev[i] > j) {
                dp[i] = max(dp[i], dp[j] + 1);
            }
        }
    }
    return *max_element(dp.begin(), dp.end());
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4040 ms 1868 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 208 KB 1st lines differ - on the 1st token, expected: '13', found: '14'
2 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 208 KB 1st lines differ - on the 1st token, expected: '13', found: '14'
2 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4038 ms 2736 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 4022 ms 1036 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 19.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 208 KB 1st lines differ - on the 1st token, expected: '13', found: '14'
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4040 ms 1868 KB Time limit exceeded
2 Halted 0 ms 0 KB -