oj.uz

Submission #1076457

# Submission time Handle Problem Language Result Execution time Memory
1076457 2024-08-26T14:04:56 Z vjudge1 Radio Towers (IOI22_towers) C++17
17 / 100
 710 ms 11328 KB 
#include "towers.h"
#include <bits/stdc++.h>


using namespace std;

using vi = vector<int>;
const int INF = 1e9;

int n;
vi H;

vi St, Dr;
vi DeltaSt, DeltaDr;

struct RMQ {
    int n;
    vector<vi> A;
    RMQ(vi V0) : n((int)V0.size()) {
        A.push_back(V0);
        for(int k = 1; (1 << k) <= n; ++k) {
            A.push_back(A.back());
            for(int i = 0; i < n; ++i) {
                if(i + (1 << (k - 1)) < n)
                    A[k][i] = max(A[k][i], A[k - 1][i + (1 << (k - 1))]);
            }
        }
    }

    int query(int l, int r) {
        int d = 31 - __builtin_clz(r - l + 1);
        return max(A[d][l], A[d][r - (1 << d) + 1]);
    }
};

pair<vi, vi> descomp(vi A) {
    RMQ R(A);
    vi Ant(n, -1);
    vi Delta(n, INF); /// cel mai mare delta posibil
    stack<int> S;
    for(int i = 0; i < n; ++i) {
        while(!S.empty() && A[S.top()] > A[i]) {
            S.pop();
        }
        if(!S.empty()) {
            Ant[i] = S.top();
            Delta[i] = R.query(S.top(), i) - A[i];
        }
        S.push(i);
    }
    return make_pair(Ant, Delta);
}

vi S;


void init(int N0, vi H0) {
    n = N0;
    H = H0;

    tie(St, DeltaSt) = descomp(H);
    reverse(H.begin(), H.end());
    tie(Dr, DeltaDr) = descomp(H);
    reverse(H.begin(), H.end());
    reverse(Dr.begin(), Dr.end());
    reverse(DeltaDr.begin(), DeltaDr.end());
    for(auto &it : Dr) 
        it = n - it - 1;
    for(int i = 0; i < n; ++i) {
        S.push_back(min(DeltaSt[i], DeltaDr[i]));
    }
    sort(S.begin(), S.end());
 //   cout << "St: ";
 //   for(auto it : St) cout << it << " ";
 //   cout << "\n";
 //   cout << "DeltaSt: ";
 //   for(auto it : DeltaSt) cout << it << " ";
 //   cout << "\n";
 //   cout << "Dr: ";
 //   for(auto it : Dr) cout << it << " ";
 //   cout << "\n";
 //   cout << "DeltaDr: ";
 //   for(auto it : DeltaDr) cout << it << " ";
 //   cout << "\n";
}

int max_towers(int L, int R, int D) {
    int v = lower_bound(S.begin(), S.end(), D) - S.begin();
    return n - v;
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 277 ms 6668 KB 1st lines differ - on the 1st token, expected: '1', found: '2'
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB 1st lines differ - on the 1st token, expected: '13', found: '131'
2 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB 1st lines differ - on the 1st token, expected: '13', found: '131'
2 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 472 ms 10884 KB 1st lines differ - on the 1st token, expected: '11903', found: '33010'
2 Halted 0 ms 0 KB -

Subtask #5
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 194 ms 2740 KB Output is correct
2 Correct 667 ms 10816 KB Output is correct
3 Correct 696 ms 10812 KB Output is correct
4 Correct 638 ms 10816 KB Output is correct
5 Correct 697 ms 10816 KB Output is correct
6 Correct 694 ms 10808 KB Output is correct
7 Correct 710 ms 10808 KB Output is correct
8 Correct 590 ms 10816 KB Output is correct
9 Correct 707 ms 11328 KB Output is correct
10 Correct 685 ms 11072 KB Output is correct
11 Correct 633 ms 11064 KB Output is correct
12 Correct 24 ms 10816 KB Output is correct
13 Correct 32 ms 10784 KB Output is correct
14 Correct 25 ms 10816 KB Output is correct
15 Correct 21 ms 11308 KB Output is correct
16 Correct 21 ms 11072 KB Output is correct
17 Correct 39 ms 10520 KB Output is correct
18 Correct 24 ms 10804 KB Output is correct
19 Correct 26 ms 11064 KB Output is correct
20 Correct 33 ms 10808 KB Output is correct
21 Correct 32 ms 10808 KB Output is correct
22 Correct 24 ms 10816 KB Output is correct
23 Correct 26 ms 10816 KB Output is correct
24 Correct 20 ms 10816 KB Output is correct
25 Correct 20 ms 11328 KB Output is correct
26 Correct 20 ms 11032 KB Output is correct
27 Correct 21 ms 11320 KB Output is correct
28 Correct 1 ms 596 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 1 ms 600 KB Output is correct
32 Correct 1 ms 600 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 1 ms 344 KB Output is correct
35 Correct 1 ms 584 KB Output is correct
36 Correct 1 ms 344 KB Output is correct
37 Correct 1 ms 344 KB Output is correct
38 Correct 1 ms 344 KB Output is correct
39 Correct 1 ms 344 KB Output is correct
40 Correct 1 ms 344 KB Output is correct
41 Correct 1 ms 600 KB Output is correct
42 Correct 1 ms 344 KB Output is correct
43 Correct 1 ms 344 KB Output is correct

Subtask #6
0 / 19.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB 1st lines differ - on the 1st token, expected: '13', found: '131'
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 277 ms 6668 KB 1st lines differ - on the 1st token, expected: '1', found: '2'
2 Halted 0 ms 0 KB -