Submission #435184

#	Time	Username	Problem	Language	Result	Execution time	Memory
435184		MinhQNgo	Distributing Candies (IOI21_candies)	C++17	3 / 100	492 ms	11956 KiB

candies

#include "candies.h"

#include <bits/stdc++.h>

using namespace std;

std::vector<int> sub1(std::vector<int> c, std::vector<int> l,
                        std::vector<int> r, std::vector<int> v) {
    int n = c.size();
    int q = l.size();
    std::vector<int> s(n, 0);
    for (int time = 0; time < q; time++) {
        int L = l[time], R = r[time], V = v[time];
        for (int i = L; i <= R; i++) {
            if (V > 0) s[i] = min(c[i], s[i] + V);
            else s[i] = max(0, s[i] + V);
        }
    }
    return s;
}

std::vector<int> sub2(std::vector<int> c, std::vector<int> l,
                        std::vector<int> r, std::vector<int> v) {
    int n = c.size();
    int q = l.size();
    std::vector<int> s(n, 0);
    vector<int> p(n + 1, 0);
    for (int time = 0; time < q; time++) {
        int L = l[time], R = r[time], V = v[time];
        p[L] += V;
        p[R + 1] -= V;
    }
    for (int i = 1; i <= n; i++) p[i] += p[i - 1];
    for (int i = 0; i < n; i++) s[i] = min(c[i], s[i] + p[i]);
    return s;
}

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();
    int q = l.size();
    std::vector<int> s(n, 0);
    if (n <= 2000) {
        s = sub1(c, l, r, v);
    }
    else {
        s = sub2(c, l, r, v);
    }
    return s;
}

Compilation message (stderr)

candies.cpp: In function 'std::vector<int> distribute_candies(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
candies.cpp:41:9: warning: unused variable 'q' [-Wunused-variable]
   41 |     int q = l.size();
      |         ^

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