Submission #519323

#	Time	Username	Problem	Language	Result	Execution time	Memory
519323		Be_dos	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	30 / 100	1814 ms	139136 KiB

sortbooks

#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 Query {
    int32_t left, x;
    int32_t ind;

    Query(int32_t left_, int32_t x_, int32_t ind_) {
        left = left_;
        x = x_;
        ind = ind_;
    }
};

#define M_INF (-1'000'000'005)

struct Node {
    int32_t max_added = M_INF;
    int32_t max1 = M_INF;
    int32_t ans = M_INF;
};

struct Segtree {
    int32_t* arr;
    int32_t size_;
    Node* segtree;

    void build(int32_t node, int32_t left, int32_t right) {
        if(right - left == 1) {
            segtree[node].max1 = arr[left];
            return;
        }
        int32_t m = (left + right) / 2;
        build(node * 2 + 1, left, m);
        build(node * 2 + 2, m, right);
        segtree[node].max1 = std::max(segtree[node * 2 + 1].max1, segtree[node *  2 + 2].max1);
        segtree[node].ans = std::max(segtree[node].max_added + segtree[node].max1, std::max(segtree[node * 2 + 1].ans, segtree[node * 2 + 2].ans));
    }

    Segtree(int32_t n, int32_t* arr_) {
        arr = arr_;
        segtree = new Node[4 * n];
        build(0, 0, n);
        size_ = n;
    }

    void propagate(int32_t node, int32_t left, int32_t m, int32_t right) {
        segtree[node * 2 + 1].max_added = std::max(segtree[node * 2 + 1].max_added, segtree[node].max_added);
        segtree[node * 2 + 1].ans = std::max(segtree[node * 2 + 1].ans, segtree[node * 2 + 1].max_added + segtree[node * 2 + 1].max1);
        segtree[node * 2 + 2].max_added = std::max(segtree[node * 2 + 2].max_added, segtree[node].max_added);
        segtree[node * 2 + 2].ans = std::max(segtree[node * 2 + 2].ans, segtree[node * 2 + 2].max_added + segtree[node * 2 + 2].max1);
    }

    void max_eq(int32_t node, int32_t left, int32_t right, int32_t query_left, int32_t query_right, int32_t x) {
        if(left >= query_right || right <= query_left)
            return;
        if(left >= query_left && right <= query_right) {
            segtree[node].max_added = std::max(segtree[node].max_added, x);
            if(right - left == 1)
                segtree[node].ans = segtree[node].max_added + segtree[node].max1;
            else
                segtree[node].ans = std::max(segtree[node].max_added + segtree[node].max1,
                                    std::max(segtree[node * 2 + 1].ans, segtree[node * 2 + 2].ans));
            return;
        }
        int32_t m = (left + right) / 2;
        propagate(node, left, m, right);
        max_eq(node * 2 + 1, left, m, query_left, query_right, x);
        max_eq(node * 2 + 2, m, right, query_left, query_right, x);
        segtree[node].ans = std::max(segtree[node].max_added + segtree[node].max1,
                            std::max(segtree[node * 2 + 1].ans, segtree[node * 2 + 2].ans));
    }

    void max_eq(int32_t left, int32_t right, int32_t x) {
        max_eq(0, 0, size_, left, right, x);
    }

    int32_t get(int32_t node, int32_t left, int32_t right, int32_t query_left, int32_t query_right) {
        if(left >= query_right || right <= query_left)
            return M_INF;
        if(left >= query_left && right <= query_right)
            return segtree[node].ans;
        int32_t m = (left + right) / 2;
        propagate(node, left, m, right);
        return std::max(get(node * 2 + 1, left, m, query_left, query_right),
                        get(node * 2 + 2, m, right, query_left, query_right));
    }

    int32_t get(int32_t left, int32_t right) {
        return get(0, 0, size_, left, right);
    }
};

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

    int32_t n, num_q;
    std::cin >> n >> num_q;

    int32_t* arr = new int32_t[n];
    for(int32_t i = 0; i < n; i++)
        std::cin >> arr[i];

    std::vector<Query>* queries = new std::vector<Query>[n];
    int32_t* bounds = new int32_t[num_q];
    for(int32_t q = 0; q < num_q; q++) {
        int32_t left, right, x;
        std::cin >> left >> right >> x;
        left--;
        right--;
        bounds[q] = x;

        queries[right].emplace_back(left, x, q);
    }

    Segtree tree(n, arr);
    std::stack<int32_t> maximums;
    int32_t* ans = new int32_t[n];
    for(int32_t i = 0; i < n; i++) {
        while(!maximums.empty() && arr[maximums.top()] <= arr[i])
            maximums.pop();
        if(!maximums.empty())
            tree.max_eq(0, maximums.top() + 1, arr[i]);
        maximums.push(i);

        for(int32_t q = 0; q < queries[i].size(); q++)
            ans[queries[i][q].ind] = tree.get(queries[i][q].left, i + 1);
    }

    for(int32_t q = 0; q < num_q; q++)
        std::cout << (ans[q] > bounds[q] ? 0 : 1) << "\n";
    return 0;
}

Compilation message (stderr)

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:147:30: warning: comparison of integer expressions of different signedness: 'int32_t' {aka 'int'} and 'std::vector<Query>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  147 |         for(int32_t q = 0; q < queries[i].size(); q++)
      |                            ~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 9 / 9
• Subtask 3: 13 / 13
• Subtask 4: 0 / 17
• Subtask 5: 0 / 30
• Subtask 6: 0 / 23