Submission #925513

#	Time	Username	Problem	Language	Result	Execution time	Memory
925513		allw	Job Scheduling (CEOI12_jobs)	C++17	0 / 100	301 ms	30072 KiB

jobs

#include <iostream>
#include <vector>

bool run(std::vector<int> a, int d, int x, std::vector<std::vector<int>>& answer, std::vector<std::vector<int>> ids) {
    int i = a.size() - d - 1;
    int j = i + d;
    //std::cout << "======\n";
    while (i >= 0) {
        int v = std::min(a[i], x);
        a[i] -= v;
        
        while (v > 0) {
            //std::cout << "To " << j << " add " << ids[i].back() << '\n';
            answer[j].push_back(ids[i].back());
            ids[i].pop_back();
            --v;
        }
        if (i == j && a[i] != 0) return false;
        if (a[i] == 0) --i;
        --j;
    }

    return true;
}

int main() {
    int n, d, m;
    std::cin >> n >> d >> m;
    std::vector<int> a(n + 1, 0);
    std::vector<std::vector<int>> ids(n + 1, std::vector<int>());

    for (int i = 0; i < m; ++i) {
        int tmp; std::cin >> tmp;
        a[tmp]++;
        ids[tmp].push_back(i + 1);
    }

    int l = 0;
    int r = n;
    std::vector<std::vector<int>> answer;
    // (l, r]
    while (l + 1 < r) {
        answer = std::vector<std::vector<int>>(n + 1, std::vector<int>());
        int m = (l + r) / 2;
        if (run(a, d, m, answer, ids)) {
            r = m;
        } else {
            l = m;
        }
    }
    answer = std::vector<std::vector<int>>(n + 1, std::vector<int>());
    run(a, d, r, answer, ids);
    std::cout << r << '\n';

    for (int i = 1; i <= n; ++i) {
        for (int j = 0; j < answer[i].size(); ++j) {
            std::cout << answer[i][j] << ' ';
        }
        std::cout << "0\n";
    }
}

Compilation message (stderr)

jobs.cpp: In function 'int main()':
jobs.cpp:56:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |         for (int j = 0; j < answer[i].size(); ++j) {
      |                         ~~^~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 100