Submission #1050654

#	Time	Username	Problem	Language	Result	Execution time	Memory
1050654		Zicrus	Distributing Candies (IOI21_candies)	C++17	0 / 100	77 ms	16720 KiB

candies

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

typedef long long ll;

ll n, q;
vector<pair<ll, ll>> cap;
vector<pair<ll, ll>> tim;
vector<ll> sum;

vector<int> distribute_candies(vector<int> c, vector<int> l,
                               vector<int> r, vector<int> v) {
    n = c.size(); q = v.size();
    cap = vector<pair<ll, ll>>(n);
    tim = {{n-1, 0}};
    sum = vector<ll>(q+1);
    for (int i = 0; i < q; i++) {
        sum[i+1] = sum[i] + v[i];
    }
    for (int i = 0; i < n; i++) {
        cap[i] = {c[i], i};
    }
    sort(cap.begin(), cap.end());

    for (int i = 0; i < q; i++) {
        ll mx = cap[tim.back().first].first;
        ll nw = sum[i+1] - sum[abs(tim.back().second)];
        if (tim.back().second < 0) nw += mx;
        while (tim.size() > 1 && (nw < 0 || nw > mx)) {
            tim.pop_back();
            nw = sum[i+1] - sum[abs(tim.back().second)];
            if (tim.back().second < 0) nw += mx;
        }
        
        ll left = -1, right = tim.back().first;
        while (left < right) {
            ll mid = (left+right+1) / 2;
            ll v = sum[i+1] - sum[abs(tim.back().second)];
            if (tim.back().second < 0) v += cap[mid].first;
            if (v < 0 || v > cap[mid].first) {
                left = mid;
            }
            else {
                right = mid-1;
            }
        }
        if (left == tim.back().first) tim.back().second = v[i] < 0 ? (i+1) : -(i+1);
        else if (left >= 0) tim.push_back({left, v[i] < 0 ? (i+1) : -(i+1)});
    }

    vector<int> res(n);
    for (int i = 0; i < n; i++) {
        while (i > tim.back().first) tim.pop_back();
        res[cap[i].second] = sum[q] - sum[abs(tim.back().second)];
        if (tim.back().second < 0) res[cap[i].second] += cap[i].first;
    }
    return res;
}

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