제출 #802917

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
802917		SamAnd	사탕 분배 (IOI21_candies)	C++17	27 / 100	330 ms	30480 KiB

candies

#include "candies.h"
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define m_p make_pair
#define sz(x) ((int)(x).size())
#define all(x) (x).begin(),(x).end()
typedef long long ll;
const int N = 200005;

int n, q, C;

struct ban
{
    int ans, l, r;
    ban(){}
    ban(int ans, int l, int r)
    {
        this->ans = ans;
        this->l = l;
        this->r = r;
    }
};

ban mer(const ban& l, const ban& r)
{
    ban res;
    if (l.ans <= r.l)
        res.ans = r.ans;
    else if (l.ans >= r.r)
        res.ans = r.ans + r.r - r.l;
    else
        res.ans = r.ans + l.ans - r.l;
    res.l = l.l + max(0, r.l - l.ans);
    res.r = l.r - max(0, l.ans + l.r - l.l - r.r);
    if (res.l > res.r)
        res.l = res.r = 0;
    return res;
}

ban t[N * 4];
void bil(int tl, int tr, int pos)
{
    t[pos] = ban(0, 0, C);
    if (tl == tr)
        return;
    int m = (tl + tr) / 2;
    bil(tl, m, pos * 2);
    bil(m + 1, tr, pos * 2 + 1);
}

void ubd(int tl, int tr, int x, int y, int pos)
{
    if (tl == tr)
    {
        y = min(y, C);
        y = max(y, -C);
        if (y == 0)
            t[pos] = ban(0, 0, C);
        else if (y > 0)
            t[pos] = ban(y, 0, C - y);
        else
            t[pos] = ban(0, -y, C);
        return;
    }
    int m = (tl + tr) / 2;
    if (x <= m)
        ubd(tl, m, x, y, pos * 2);
    else
        ubd(m + 1, tr, x, y, pos * 2 + 1);
    t[pos] = mer(t[pos * 2], t[pos * 2 + 1]);
}

vector<int> v[N];
vector<pair<int, int> > p;

int c[N * 4];
void shi(int pos)
{
    if (c[pos] == N)
        return;
    c[pos * 2] = c[pos * 2 + 1] = c[pos];
    c[pos] = N;
}
void ubd(int tl, int tr, int l, int r, int y, int pos)
{
    if (l > r)
        return;
    if (tl == l && tr == r)
    {
        c[pos] = y;
        return;
    }
    shi(pos);
    int m = (tl + tr) / 2;
    ubd(tl, m, l, min(m, r), y, pos * 2);
    ubd(m + 1, tr, max(m + 1, l), r, y, pos * 2 + 1);
}
int qry(int tl, int tr, int x, int pos)
{
    if (tl == tr)
        return c[pos];
    shi(pos);
    int m = (tl + tr) / 2;
    if (x <= m)
        return qry(tl, m, x, pos * 2);
    else
        return qry(m + 1, tr, x, pos * 2 + 1);
}

vector<ll> pr;

int qryy(int i, int q, const vector<int>& v)
{
    int j = qry(0, n - 1, i, 1);
    int s;
    if (j == -1 || v[j] < 0)
        s = 0;
    else
        s = p[i].fi;
    return s + pr[q] - pr[j + 1];
}

std::vector<int> distribute_candies(std::vector<int> c, std::vector<int> l,
                                    std::vector<int> r, std::vector<int> vv) {

    n = sz(c);
    q = sz(l);
    vector<int> ans(n);

    bool f = true;
    for (int i = 0; i < n; ++i)
    {
        if (c[i] != c[0])
        {
            f = false;
            break;
        }
    }
    if (f)
    {
        for (int i = 0; i < q; ++i)
        {
            v[l[i]].push_back((i + 1));
            v[r[i] + 1].push_back(-(i + 1));
        }

        C = c[0];
        bil(0, q - 1, 1);

        for (int i = 0; i < n; ++i)
        {
            for (int j = 0; j < sz(v[i]); ++j)
            {
                if (v[i][j] > 0)
                {
                    --v[i][j];
                    ubd(0, q - 1, v[i][j], vv[v[i][j]], 1);
                }
                else
                {
                    v[i][j] *= -1;
                    --v[i][j];
                    ubd(0, q - 1, v[i][j], 0, 1);
                }
            }
            ans[i] = t[1].ans;
        }
    }
    else
    {
        for (int i = 0; i < n; ++i)
        {
            p.push_back(m_p(c[i], i));
        }
        sort(all(p));

        pr.push_back(0);
        for (int i = 0; i < q; ++i)
            pr.push_back(pr.back() + vv[i]);
        ubd(0, n - 1, 0, n - 1, -1, 1);
        for (int i = 0; i < q; ++i)
        {
            if (vv[i] > 0)
            {
                int l = 0, r = n - 1;
                int u = -1;
                while (l <= r)
                {
                    int m = (l + r) / 2;
                    if (qryy(m, i, vv) + vv[i] >= m)
                    {
                        u = m;
                        l = m + 1;
                    }
                    else
                        r = m - 1;
                }
                ubd(0, n - 1, 0, u, i, 1);
            }
            else
            {
                int l = 0, r = n - 1;
                int u = -1;
                while (l <= r)
                {
                    int m = (l + r) / 2;
                    if (qryy(m, i, vv) + vv[i] <= 0)
                    {
                        u = m;
                        l = m + 1;
                    }
                    else
                        r = m - 1;
                }
                ubd(0, n - 1, 0, u, i, 1);
            }
        }

        for (int i = 0; i < n; ++i)
        {
            ans[i] = qryy(i, q, vv);
        }
    }

    return ans;
}

/*
10
1 2 3 4 5 6 7 8 9 10
2
0 9 10
0 9 -5
*/

• Subtask 1: 0 / 3
• Subtask 2: 0 / 8
• Subtask 3: 27 / 27
• Subtask 4: 0 / 29
• Subtask 5: 0 / 33