Submission #1243691

#	Time	Username	Problem	Language	Result	Execution time	Memory
1243691		Quentolosse	Distributing Candies (IOI21_candies)	C++20	3 / 100	5085 ms	15596 KiB

candies

#include "candies.h"

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

vector<signed> distribute_candies(vector<signed> c, vector<signed> l, vector<signed> r, vector<signed> v) {
    int n = c.size();
    int q = l.size();
    
    vector<pair<int,int>> inter;
    for (int i = 0; i < q; i++)
    {
        inter.push_back(make_pair(l[i], i));
        inter.push_back(make_pair(r[i]+1, i));
    }

    sort(inter.begin(), inter.end());

    vector<int> hauteurs(q+1, 0);

    int i_inter = 0;
    vector<signed> rep(n, 0);

    for (int i = 0; i < n; i++)
    {
        while(i_inter < (int)inter.size() && inter[i_inter].first <= i) {
            int val = 0;
            int j = inter[i_inter].second;
            if (inter[i_inter].first == l[j]) {
                val = v[j];
            }
            else {
                val = -v[j];
            }

            for (int k = j; k <= q; k++)
            {
                hauteurs[k] += val;
            }
            i_inter++;
        }


        int mini = 1e9;
        int maxi = -1e9;
        int pos_min = -1;
        int pos_max = -1;

        int pos = -1;
        for (int j = q - 1; j >= 0; j--)
        {
            if (hauteurs[j] < mini) {
                mini = hauteurs[j];
                pos_min = j;
            }
            
            if (hauteurs[j] > maxi) {
                maxi = hauteurs[j];
                pos_max = j;
            }
            
            if (maxi - mini >= c[i]) {
                if (j == pos_min) {
                    pos = pos_max;
                }
                else {
                    pos = pos_min;
                }

                break;
            }
        }

        if (pos == -1) {
            if (mini >= 0 && maxi <= c[i]) {
                rep[i] = hauteurs[q];
                pos = -2;
            }
            else if (mini < 0) {
                pos = pos_min;
            }
            else if (maxi > c[i]) {
                pos = pos_max;
            }
        }
        if (pos == pos_max) {
            rep[i] = c[i] - (hauteurs[pos] - hauteurs[q]);
        }
        else {
            rep[i] = hauteurs[q] - hauteurs[pos];
        }
    }
    
    return rep;
    
}

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