oj.uz

Submission #514846

# Submission time Handle Problem Language Result Execution time Memory
514846 2022-01-18T14:49:38 Z Be_dos Divide and conquer (IZhO14_divide) C++17
48 / 100
 1000 ms 2440 KB 
#include <iostream>
#include <cmath>
#include <cctype>
#include <vector>
#include <algorithm>
#include <set>
#include <map>
#include <deque>
#include <stack>
#include <unordered_set>
#include <sstream>
#include <cstring>
#include <iomanip>
#include <queue>
#include <unordered_map>
#include <random>
#include <cfloat>
#include <chrono>
#include <bitset>
#include <complex>
#include <immintrin.h>
#include <cassert>

struct Point {
    int32_t x;
    int32_t gold, energy;
};

struct Node {
    Node* left = nullptr, *right = nullptr;
    int32_t priority;
    int64_t key;
    int32_t value;
    int32_t min_value;

    Node(int64_t key_, int32_t value_) {
        key = key_;
        value = value_;
        min_value = value;
    }
};

void recalc(Node* node) {
    node->min_value = node->value;
    if(node->left != nullptr)
        node->min_value = std::min(node->min_value, node->left->min_value);
    if(node->right != nullptr)
        node->min_value = std::min(node->min_value, node->right->min_value);
}

std::pair<Node*, Node*> split(Node* node, int64_t x) {
    if(node == nullptr)
        return {nullptr, nullptr};
    if(node->key < x) {
        std::pair<Node*, Node*> res = split(node->right, x);
        node->right = res.first;
        recalc(node);
        return {node, res.second};
    } else {
        std::pair<Node*, Node*> res = split(node->left, x);
        node->left = res.second;
        recalc(node);
        return {res.first, node};
    }
}

Node* merge(Node* node1, Node* node2) {
    if(node1 == nullptr)
        return node2;
    if(node2 == nullptr)
        return node1;
    if(node1->priority < node2->priority) {
        node1->right = merge(node1->right, node2);
        recalc(node1);
        return node1;
    } else {
        node2->left = merge(node1, node2->left);
        recalc(node2);
        return node2;
    }
}

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(0);

    int32_t n;
    std::cin >> n;

    Point* points = new Point[n];
    for(int32_t i = 0; i < n; i++)
        std::cin >> points[i].x >> points[i].gold >> points[i].energy;

    int64_t* pref_sum = new int64_t[n + 1];
    pref_sum[0] = 0;
    for(int32_t i = 1; i <= n; i++)
        pref_sum[i] = pref_sum[i - 1] + points[i - 1].energy;

    int64_t* gold_pref_sum = new int64_t[n + 1];
    gold_pref_sum[0] = 0;
    for(int32_t i = 1; i <= n; i++)
        gold_pref_sum[i] = gold_pref_sum[i - 1] + points[i - 1].gold;

    int64_t ans = 0;
    Node* root = nullptr;
    for(int32_t i = 0; i < n; i++) {
        std::pair<Node*, Node*> parts = split(root, points[i].x - pref_sum[i]);
        root = merge(merge(parts.first, new Node(points[i].x - pref_sum[i], i)), parts.second);

        int64_t val = points[i].x - pref_sum[i + 1];
        parts = split(root, val);
        ans = std::max(ans, gold_pref_sum[i + 1] - gold_pref_sum[parts.second->min_value]);
        root = merge(parts.first, parts.second);
    }
    std::cout << ans;
    return 0;
}

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct

Subtask #2
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 12 ms 416 KB Output is correct
19 Correct 10 ms 332 KB Output is correct
20 Correct 8 ms 416 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 2 ms 588 KB Output is correct
24 Correct 2 ms 588 KB Output is correct

Subtask #3
0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 12 ms 416 KB Output is correct
19 Correct 10 ms 332 KB Output is correct
20 Correct 8 ms 416 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 2 ms 588 KB Output is correct
24 Correct 2 ms 588 KB Output is correct
25 Correct 200 ms 820 KB Output is correct
26 Correct 808 ms 1412 KB Output is correct
27 Correct 819 ms 1320 KB Output is correct
28 Execution timed out 1077 ms 2440 KB Time limit exceeded
29 Halted 0 ms 0 KB -