oj.uz

Submission #946342

# Submission time Handle Problem Language Result Execution time Memory
946342 2024-03-14T14:03:19 Z zwezdinv Candies (JOI18_candies) C++17
100 / 100
 623 ms 15232 KB 
#include<bits/stdc++.h>

const int N = 2e5;

int n;
int a[N];

std::vector<long long> merge(std::vector<long long> a_, std::vector<long long> b_) {
        int n = a_.size(), m = b_.size();
        std::vector<long long> a(n - 1), b(m - 1);
        for (int i = 0; i + 1 < n; ++i) {
                a[i] = a_[i + 1] - a_[i];
        }
        for (int i = 0; i + 1 < m; ++i) {
                b[i] = b_[i + 1] - b_[i];
        }
        std::vector<long long> c;
        std::merge(a.begin(), a.end(), b.begin(), b.end(), std::back_inserter(c), std::greater<>());
        std::vector<long long> c_(c.size() + 1);
        c_[0] = a_[0] + b_[0];
        for (int i = 0; i < c.size(); ++i) {
                c_[i + 1] = c_[i] + c[i];
        }
        return c_;
}

std::vector<long long> mx(std::vector<long long> a, std::vector<long long> b) {
        std::vector<long long> res(std::max(a.size(), b.size()), LLONG_MIN);
        for (int i = 0; i < res.size(); ++i) {
                if (i < a.size()) res[i] = std::max(res[i], a[i]);
                if (i < b.size()) res[i] = std::max(res[i], b[i]);
        }
        return res;
}

std::array<std::array<std::vector<long long>, 2>, 2> dc(int l, int r) {
        std::array<std::array<std::vector<long long>, 2>, 2> res;
        if (l == r) {
                for (int x = 0; x < 2; ++x) {
                        for (int y = 0; y < 2; ++y) {
                                res[x][y] = {0};
                        }
                }
                res[1][1].push_back(a[l]);                
                // std::cout << l << ' ' << r << std::endl;
                // for (auto xx : res) {
                //         for (auto x : xx) {
                //                 for (auto i : x) std::cout << i << ' ';
                //                 std::cout << std::endl;
                //         }
                // }
                // std::cout << std::endl;
                return res;
        }
        int m = (l + r) / 2;
        auto left = dc(l, m), right = dc(m + 1, r);
        for (int x = 0; x < 2; ++x) {
                for (int y = 0; y < 2; ++y) {
                        for (int x_ = 0; x_ < 2; ++x_) {
                                for (int y_ = 0; y_ < 2; y_++) {
                                        if (y == 1 && x_ == 1) continue;
                                        res[x][y_] = mx(res[x][y_], merge(left[x][y], right[x_][y_]));
                                }
                        }
                }
        }
        // std::cout << l << ' ' << r << std::endl;
        // for (auto xx : res) {
        //         for (auto x : xx) {
        //                 for (auto i : x) std::cout << i << ' ';
        //                 std::cout << std::endl;
        //         }
        // }
        // std::cout << std::endl;
        return res;
}


int main() {
        std::cin.tie(nullptr)->sync_with_stdio(false);

        std::cin >> n;
        for (int i = 0; i < n; ++i) std::cin >> a[i];
        auto vc = dc(0, n - 1);
        std::vector<long long> res;
        for (int x = 0; x < 2; ++x) {
                for (int y = 0; y < 2; ++y) {
                        res = mx(res, vc[x][y]);
                }
        }
        for (int k = 1; k <= (n + 1) / 2; ++k) std::cout << res[k] << '\n';
}

Compilation message

candies.cpp: In function 'std::vector<long long int> merge(std::vector<long long int>, std::vector<long long int>)':
candies.cpp:21:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |         for (int i = 0; i < c.size(); ++i) {
      |                         ~~^~~~~~~~~~
candies.cpp: In function 'std::vector<long long int> mx(std::vector<long long int>, std::vector<long long int>)':
candies.cpp:29:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |         for (int i = 0; i < res.size(); ++i) {
      |                         ~~^~~~~~~~~~~~
candies.cpp:30:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |                 if (i < a.size()) res[i] = std::max(res[i], a[i]);
      |                     ~~^~~~~~~~~~
candies.cpp:31:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |                 if (i < b.size()) res[i] = std::max(res[i], b[i]);
      |                     ~~^~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 604 KB Output is correct
2 Correct 5 ms 496 KB Output is correct
3 Correct 5 ms 604 KB Output is correct
4 Correct 7 ms 604 KB Output is correct
5 Correct 5 ms 604 KB Output is correct
6 Correct 5 ms 600 KB Output is correct
7 Correct 5 ms 604 KB Output is correct
8 Correct 7 ms 492 KB Output is correct
9 Correct 5 ms 604 KB Output is correct
10 Correct 5 ms 604 KB Output is correct
11 Correct 5 ms 568 KB Output is correct
12 Correct 5 ms 604 KB Output is correct
13 Correct 5 ms 604 KB Output is correct
14 Correct 5 ms 604 KB Output is correct
15 Correct 7 ms 604 KB Output is correct
16 Correct 5 ms 604 KB Output is correct
17 Correct 5 ms 604 KB Output is correct
18 Correct 5 ms 604 KB Output is correct
19 Correct 5 ms 580 KB Output is correct
20 Correct 5 ms 600 KB Output is correct

Subtask #2
92.0 / 92.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 604 KB Output is correct
2 Correct 5 ms 496 KB Output is correct
3 Correct 5 ms 604 KB Output is correct
4 Correct 7 ms 604 KB Output is correct
5 Correct 5 ms 604 KB Output is correct
6 Correct 5 ms 600 KB Output is correct
7 Correct 5 ms 604 KB Output is correct
8 Correct 7 ms 492 KB Output is correct
9 Correct 5 ms 604 KB Output is correct
10 Correct 5 ms 604 KB Output is correct
11 Correct 5 ms 568 KB Output is correct
12 Correct 5 ms 604 KB Output is correct
13 Correct 5 ms 604 KB Output is correct
14 Correct 5 ms 604 KB Output is correct
15 Correct 7 ms 604 KB Output is correct
16 Correct 5 ms 604 KB Output is correct
17 Correct 5 ms 604 KB Output is correct
18 Correct 5 ms 604 KB Output is correct
19 Correct 5 ms 580 KB Output is correct
20 Correct 5 ms 600 KB Output is correct
21 Correct 559 ms 14312 KB Output is correct
22 Correct 585 ms 14104 KB Output is correct
23 Correct 568 ms 14256 KB Output is correct
24 Correct 583 ms 14176 KB Output is correct
25 Correct 531 ms 14156 KB Output is correct
26 Correct 514 ms 14172 KB Output is correct
27 Correct 598 ms 14172 KB Output is correct
28 Correct 530 ms 14176 KB Output is correct
29 Correct 526 ms 14172 KB Output is correct
30 Correct 520 ms 14120 KB Output is correct
31 Correct 533 ms 14328 KB Output is correct
32 Correct 523 ms 14176 KB Output is correct
33 Correct 564 ms 14140 KB Output is correct
34 Correct 571 ms 14152 KB Output is correct
35 Correct 564 ms 14160 KB Output is correct
36 Correct 623 ms 15184 KB Output is correct
37 Correct 555 ms 14868 KB Output is correct
38 Correct 552 ms 14888 KB Output is correct
39 Correct 581 ms 15064 KB Output is correct
40 Correct 520 ms 14944 KB Output is correct
41 Correct 567 ms 14884 KB Output is correct
42 Correct 530 ms 14976 KB Output is correct
43 Correct 536 ms 14972 KB Output is correct
44 Correct 551 ms 15232 KB Output is correct
45 Correct 532 ms 14936 KB Output is correct
46 Correct 557 ms 14972 KB Output is correct
47 Correct 534 ms 15060 KB Output is correct
48 Correct 537 ms 15216 KB Output is correct
49 Correct 572 ms 14952 KB Output is correct
50 Correct 552 ms 14956 KB Output is correct