Submission #58112

#	Time	Username	Problem	Language	Result	Execution time	Memory
58112		paulica	Bubble Sort 2 (JOI18_bubblesort2)	C++14	0 / 100	179 ms	108864 KiB

bubblesort2

#include "bubblesort2.h"

#include <bits/stdc++.h>
using namespace std;

const int Off = 1 << 20;

struct SegTree {
    int a[2 * Off], lazy[2 * Off];
    set<int> inds[Off];

    void build() {
        for (int i = 0; i < Off; i++) {
            inds[i].insert(-1e9);
            a[i + Off] = *inds[i].rbegin();
        }

        for (int i = Off - 1; i > 0; i--)
            a[i] = max(a[2 * i], a[2 * i + 1]);
    }

    void propagate(int i) {
        a[i] += lazy[i];

        if (i < Off) {
            lazy[2 * i] += lazy[i];
            lazy[2 * i + 1] += lazy[i];
        }

        lazy[i] = 0;
    }

    void update_path(int j, int i = 1, int lo = 0, int hi = Off) {
        propagate(i);
        if (lo + 1 == hi) return;

        int mid = (lo + hi) / 2;
        if (j < mid) update_path(j, 2 * i, lo, mid);
        else update_path(j, 2 * i + 1, mid, hi);

        a[i] = max(a[2 * i], a[2 * i + 1]);
    }

    void update_inds(int i, int ind, bool add) {
        a[i + Off] -= *inds[i].rbegin();
        
        if (add) inds[i].insert(ind);
        else inds[i].erase(ind);

        a[i + Off] += *inds[i].rbegin();
        
        update_path(i);
    }

    void update_segment(int l, int r, int val, int i = 1, int lo = 0, int hi = Off) {
        if (r <= lo || hi <= l) return;
        if (l <= lo && hi <= r) {
            lazy[i] += val;
            propagate(i);
        } else {
            propagate(i);

            int mid = (lo + hi) / 2;
            update_segment(l, r, val, 2 * i, lo, mid);
            update_segment(l, r, val, 2 * i + 1, mid, hi);

            a[i] = max(a[2 * i], a[2 * i + 1]);
        }
    }

    void update_segment(int i, bool add) {
        if (add) update_segment(i + 1, Off, -1);
        else update_segment(i + 1, Off, 1);
    }

    int query() {
        propagate(1);
        return a[1];
    }
} T;

vector<int> countScans(vector<int> a, vector<int> x, vector<int> v){
    int n = a.size(), q = x.size();
    vector<int> answer(q);

	vector<int> val;
    map<int, int> compress;

    for (int i : a) val.push_back(i);
    for (int i : v) val.push_back(i);

    sort(val.begin(), val.end());
    val.erase(unique(val.begin(), val.end()), val.end());

    for (int i = 0; i < (int)val.size(); i++)
        compress[val[i]] = i;

    for (int i = 0; i < n; i++)
        T.inds[compress[a[i]]].insert(i);

    T.build();

    for (int i = 0; i < n; i++)
        T.update_segment(compress[a[i]], true);

    for (int i = 0; i < q; i++) {
        T.update_inds(compress[a[x[i]]], x[i], false);
        T.update_segment(compress[a[x[i]]], false);

        T.update_inds(compress[v[i]], x[i], true);
        T.update_segment(compress[v[i]], true);

        answer[i] = T.query();

        a[x[i]] = v[i];
    }

    return answer;
}

• Subtask 1: 0 / 17
• Subtask 2: 0 / 21
• Subtask 3: 0 / 22
• Subtask 4: 0 / 40