제출 #894121

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
894121		Olympia	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	17 / 100	3057 ms	262144 KiB

sortbooks

#include <iostream>
#include <vector>
#include <map>
#include <set>
#include <climits>
#include <cmath>
#include <cassert>
#include <algorithm>
using namespace std;
struct Node {
    int mx;
    int mn;
    int val;
    int l;
    int r;
    Node (int l, int r) {
        this->mx = INT_MIN, this->mn = INT_MAX, this->val = 0, this->l = l, this->r = r;
    }
};
Node id = {-1, -1};
struct MergeSortTree {
    vector<set<int>> vec;
    vector<int> v;
    void build (int dum, int tl, int tr) {
        if (tl == tr) {
            vec[dum] = {v[tl]};
            return;
        }
        build(2 * dum + 1, tl, (tl + tr)/2);
        build(2 * dum + 2, (tl + tr)/2 + 1, tr);
        std::set_union(std::begin(vec[2 * dum + 1]), std::end(vec[2 * dum + 1]),
                       std::begin(vec[2 * dum + 2]), std::end(vec[2 * dum + 2]),
                       std::inserter(vec[dum], std::begin(vec[dum])));
    }
    int query (int dum, int tl, int tr, int l, int r, int k) {
        if (tl >= l && tr <= r) {
            auto it = vec[dum].lower_bound(k);
            if (it == vec[dum].begin()) {
                return -INT_MAX;
            }
            return *(--it);
        }
        if (tl > r || l > tr) {
            return -INT_MAX;
        }
        return max(query(2 * dum + 1, tl, (tl + tr)/2, l, r, k), query(2 * dum + 2, (tl + tr)/2 + 1, tr, l, r, k));
    }
    int query (int l, int r, int k) {
        return query(0, 0, (int)vec.size()/2 - 1, l, r, k);
    }
    MergeSortTree (vector<int> v) {
        assert(__builtin_popcount(v.size()) == 1);
        this->v = v;
        vec.reserve((int)v.size() * 2);
        for (int i = 0; i < 2 * v.size(); i++) {
            vec.push_back({});
        }
        build(0, 0, (int)vec.size()/2 - 1);
    }
};
struct SegmentTree {
    vector<Node> vec;
    vector<int> nodes;
    MergeSortTree ms = MergeSortTree({0});
    Node merge (Node left, Node right) {
        if (left.l == -1) {
            return right;
        }
        if (right.l == -1) {
            return left;
        }
        Node ans = Node(left.l, right.r);
        ans.mn = min(left.mn, right.mn);
        ans.mx = max(left.mx, right.mx);
        ans.val = max(left.val, right.val);
        if (right.mn < left.mx) {
            ans.val = max(ans.val, ms.query(right.l, right.r, left.mx - 1) + left.mx);
        }
        return ans;
    }
    Node query (int dum, int tl, int tr, int l, int r) {
        if (tl >= l && tr <= r) {
            return vec[dum];
        }
        if (tl > r || tr < l) {
            return id;
        }
        return merge(query(2 * dum + 1, tl, (tl + tr)/2,l, r), query(2 * dum + 2, (tl + tr)/2 + 1, tr, l, r));
    }
    int query (int l, int r) {
        return query(0, 0, (int)vec.size()/2 - 1, l, r).val;
    }
    Node build (int dum, int tl, int tr) {
        if (tl == tr) {
            vec[dum] = Node(tl, tr);
            vec[dum].mn = vec[dum].mx = nodes[tl];
            return vec[dum];
        }
        build(2 * dum + 1, tl, (tl + tr)/2);
        build(2 * dum + 2, (tl + tr)/2 + 1, tr);
        return vec[dum] = merge( build(2 * dum + 1, tl, (tl + tr)/2), build(2 * dum + 2, (tl + tr)/2 + 1, tr));
    }
    SegmentTree (vector<int> nodes) {
        this->nodes = nodes;
        int n = nodes.size();
        n = (1 << (int)log2(n)) * 2;
        vec.assign(2 * n, Node(0, 0));
        while (this->nodes.size() < vec.size()) {
            this->nodes.push_back((int)1e9);
        }
        this->ms = MergeSortTree(this->nodes);
        build(0, 0, (int)vec.size()/2 - 1);
    }
};
int main () {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n, q;
    cin >> n >> q;
    vector<int> v(n);
    for (int i = 0; i < n; i++) {
        cin >> v[i];
    }
    SegmentTree st(v);
    while (q--) {
        int l, r, k;
        cin >> l >> r >> k;
        l--, r--;
        cout << (st.query(l, r) <= k) << '\n';
    }
}

컴파일 시 표준 에러 (stderr) 메시지

sortbooks.cpp: In constructor 'MergeSortTree::MergeSortTree(std::vector<int>)':
sortbooks.cpp:55:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |         for (int i = 0; i < 2 * v.size(); i++) {
      |                         ~~^~~~~~~~~~~~~~

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