Submission #441836

#	Time	Username	Problem	Language	Result	Execution time	Memory
441836		alan8585	Distributing Candies (IOI21_candies)	C++17	29 / 100	1014 ms	20184 KiB

candies

#include "candies.h"

#include <vector>
#include <algorithm>
using namespace std;

// using ll = long long;
using ll = int;
const int MAXN = 200100;
vector<pair<int, int>> V;

struct datas {
    ll mx, mi, set, p;
    datas operator+(const datas &i) const {
        datas re;
        re.mx = max(mx, i.mx);
        re.mi = min(mi, i.mi);
        re.set = 0;
        re.p = 0;
        return re;
    }
    // data(ll a) : mx(a), mi(a), set(0), p(0);
}tree[MAXN << 2];

void update(int c, int l, int r) {
    if(l == r)
        return;
    int m = (l + r) >> 1;
    if(tree[c].set) {
        tree[c << 1].p = 0;
        tree[c << 1 | 1].p = 0;
        if(tree[c].set == -1) {
            tree[c << 1].set = tree[c].set;
            tree[c << 1 | 1].set = tree[c].set;
            tree[c << 1].mx = 0;
            tree[c << 1 | 1].mx = 0;
            tree[c << 1].mi = 0;
            tree[c << 1 | 1].mi = 0;
        } else {
            tree[c << 1].set = tree[c].set;
            tree[c << 1 | 1].set = tree[c].set;
            tree[c << 1].mx = V[m].first;
            tree[c << 1 | 1].mx = V[r].first;
            tree[c << 1].mi = V[l].first;
            tree[c << 1 | 1].mi = V[m + 1].first;
        }
    }
    if(tree[c].p) {
        tree[c << 1].p += tree[c].p;
        tree[c << 1 | 1].p += tree[c].p;
        tree[c << 1].mx += tree[c].p;
        tree[c << 1 | 1].mx += tree[c].p;
        tree[c << 1].mi += tree[c].p;
        tree[c << 1 | 1].mi += tree[c].p;
    }
    tree[c].p = tree[c].set = 0;
}

void pluss(int l, int r, int tl, int tr, int c, ll x) {
    update(c, tl, tr);
    if(l <= tl && tr <= r) {
        tree[c].mi += x;
        tree[c].mx += x;
        tree[c].p += x;
        return;
    }
    int tm = (tl + tr) >> 1;
    if(l <= tm)
        pluss(l, r, tl, tm, c << 1, x);
    if(tm + 1 <= r)
        pluss(l, r, tm + 1, tr, c << 1 | 1, x);
    tree[c] = tree[c << 1] + tree[c << 1 | 1];
}

void set(int l, int r, int tl, int tr, int c, ll x) {
    update(c, tl, tr);
    if(l <= tl && tr <= r) {
        if(x == -1) {
            tree[c].set = x;
            tree[c].mi = 0;
            tree[c].mx = 0;
            tree[c].p = 0;
        } else {
            tree[c].set = x;
            tree[c].mi = V[tl].first;
            tree[c].mx = V[tr].first;
            tree[c].p = 0;
        }
        return;
    }
    int tm = (tl + tr) >> 1;
    if(l <= tm)
        set(l, r, tl, tm, c << 1, x);
    if(tm + 1 <= r)
        set(l, r, tm + 1, tr, c << 1 | 1, x);
    tree[c] = tree[c << 1] + tree[c << 1 | 1];
}

int search(int x, int l, int r, int c) {
    update(c, l, r);
    if(l == r)
        return tree[c].mi;
    int m = (l + r) >> 1;
    if(x <= m)
        return search(x, l, m, c << 1);
    return search(x, m + 1, r, c << 1 | 1);
}

std::vector<int> distribute_candies(std::vector<int> c, std::vector<int> l,
                                    std::vector<int> r, std::vector<int> v) {
    int n = c.size(), q = l.size();
    for(int i = 0; i < n; i++)
        V.push_back(make_pair(c[i], i));
    sort(V.begin(), V.end());
    for(int i = 0; i < q; i++) {
        if(v[i] > 0) {
            int l = 0, r = n, m = -1;
            while(l != r) {
                m = (l + r) >> 1;
                if(v[i] + search(m, 0, n - 1, 1) > V[m].first)
                    l = m + 1;
                else
                    r = m;
            }
            if(l)
                set(0, l - 1, 0, n - 1, 1, 1);
            if(l != n)
                pluss(l, n - 1, 0, n - 1, 1, v[i]);
        } else {
            int l = 0, r = n, m = -1;
            while(l != r) {
                m = (l + r) >> 1;
                if(search(m, 0, n - 1, 1) + v[i] < 0)
                    l = m + 1;
                else
                    r = m;
            }
            if(l)
                set(0, l - 1, 0, n - 1, 1, -1);
            if(l != n)
                pluss(l, n - 1, 0, n - 1, 1, v[i]);
        }
    }
    vector<int> ans(n);
    for(int i = 0; i < n; i++) {
        ans[V[i].second] = search(i, 0, n - 1, 1);
    }
    return ans;
}

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