oj.uz

Submission #709772

# Submission time Handle Problem Language Result Execution time Memory
709772 2023-03-14T11:50:52 Z KoD Radio Towers (IOI22_towers) C++17
17 / 100
 1162 ms 15348 KB 
#include "towers.h"

#include <vector>
#include <iostream>
#include <algorithm>
#include <utility>
#include <numeric>
#include <limits>
#include <iterator>
#include <tuple>
#include <cassert>

namespace kod {

using std::vector;
using std::cerr;
using std::endl;
using std::begin;
using std::end;
using std::pair;
using std::tuple;

template <class F>
struct make_fixed : private F {
    explicit make_fixed(F&& f) : F(std::forward<F>(f)) {}
    template <class... Args> decltype(auto) operator()(Args&&... args) const {
        return F::operator()(*this, std::forward<Args>(args)...);
    }
};

int N;
vector<int> H;

vector<int> par, stack;
vector<vector<int>> child;
vector<pair<int, int>> sum;

void init() {
    par.assign(N, -1);
    for (int i = 0; i < N; ++i) {
        int j = -1;
        while (!stack.empty() and H[stack.back()] < H[i]) {
            j = stack.back();
            stack.pop_back();
        }
        if (j != -1) par[j] = i;
        if (!stack.empty()) par[i] = stack.back();
        stack.push_back(i);
    }
    int root = -1;
    child.resize(N);
    for (int i = 0; i < N; ++i) {
        if (par[i] == -1) root = i;
        else child[par[i]].push_back(i);
    }
    make_fixed([&](auto&& dfs, const int u) -> int {
        int min = H[u];
        for (const int v : child[u]) {
            const int m = dfs(v);
            min = std::min(min, m);
            sum.emplace_back(H[u] - m, 1);
            sum.emplace_back(H[v] - m, -1);
        }
        return min;
    })(root);
    std::sort(begin(sum), end(sum));
    for (int i = (int)sum.size() - 1; i > 0; --i) {
        sum[i - 1].second += sum[i].second;
    }
}

int solve(const int L, const int R, const int D) {
    assert(L == 0 and R == N - 1);
    return std::max(1, std::lower_bound(begin(sum), end(sum), pair(D, 0))->second);
}

}

void init(int N, std::vector<int> H) {
    kod::N = N;
    kod::H = H;
    kod::init();
}

int max_towers(int L, int R, int D) {
    return kod::solve(L, R, D);
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Runtime error 23 ms 15348 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 464 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 464 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Runtime error 49 ms 15104 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #5
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 348 ms 2336 KB Output is correct
2 Correct 937 ms 8364 KB Output is correct
3 Correct 836 ms 8464 KB Output is correct
4 Correct 943 ms 7852 KB Output is correct
5 Correct 992 ms 7920 KB Output is correct
6 Correct 1020 ms 7852 KB Output is correct
7 Correct 1153 ms 7852 KB Output is correct
8 Correct 1051 ms 14132 KB Output is correct
9 Correct 1162 ms 14504 KB Output is correct
10 Correct 1127 ms 12328 KB Output is correct
11 Correct 947 ms 12948 KB Output is correct
12 Correct 50 ms 8468 KB Output is correct
13 Correct 44 ms 7832 KB Output is correct
14 Correct 34 ms 7952 KB Output is correct
15 Correct 25 ms 14608 KB Output is correct
16 Correct 37 ms 13700 KB Output is correct
17 Correct 40 ms 8204 KB Output is correct
18 Correct 36 ms 8464 KB Output is correct
19 Correct 37 ms 8452 KB Output is correct
20 Correct 41 ms 7956 KB Output is correct
21 Correct 38 ms 7952 KB Output is correct
22 Correct 37 ms 7956 KB Output is correct
23 Correct 45 ms 7956 KB Output is correct
24 Correct 37 ms 14108 KB Output is correct
25 Correct 30 ms 14596 KB Output is correct
26 Correct 33 ms 12308 KB Output is correct
27 Correct 33 ms 14232 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 464 KB Output is correct
31 Correct 1 ms 592 KB Output is correct
32 Correct 1 ms 464 KB Output is correct
33 Correct 1 ms 336 KB Output is correct
34 Correct 1 ms 464 KB Output is correct
35 Correct 1 ms 464 KB Output is correct
36 Correct 1 ms 512 KB Output is correct
37 Correct 1 ms 464 KB Output is correct
38 Correct 2 ms 464 KB Output is correct
39 Correct 1 ms 464 KB Output is correct
40 Correct 1 ms 464 KB Output is correct
41 Correct 1 ms 592 KB Output is correct
42 Correct 1 ms 464 KB Output is correct
43 Correct 1 ms 552 KB Output is correct

Subtask #6
0 / 19.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 464 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Runtime error 23 ms 15348 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -