Submission #696424

#	Time	Username	Problem	Language	Result	Execution time	Memory
696424		cfjason	Job Scheduling (CEOI12_jobs)	C++17	80 / 100	1082 ms	30412 KiB

jobs

#include <bits/stdc++.h>

using namespace std;

int main(int argc, char const *argv[])
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n, d, m;
    cin >> n >> d >> m;
    vector<vector<int>> requestsByDay(n);
    vector<string> validResults;
    for (int i = 0; i < m; i++)
    {
        int day;
        cin >> day;
        requestsByDay[day-1].push_back(i+1);
    }
    int lower = 0, upper = m+1;
    while (lower + 1 < upper)
    {
        int mid = (lower + upper) / 2;
        int reqIndex = 0;
        priority_queue<array<int, 2>, vector<array<int, 2>>, greater<>> line;
        bool valid = true;
        vector<string> results(n);
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < requestsByDay[i].size(); j++)
                line.push(array<int, 2>{i, requestsByDay[i][j]});
            for (int j = 0; j < mid; j++)
            {
                if (line.size())
                {
                    if (i - line.top()[0] > d)
                    {
                        valid = false;
                        break;
                    }
                    results[i] += to_string(line.top()[1]) + " ";
                    line.pop();
                }
                else
                {
                    break;
                }
            }
            results[i] += "0";
            if (!valid)
                break;
        }
        if (line.size())
            valid = false;

        if(valid){
            validResults = results;
            upper = mid;
        }
        else{
            lower = mid;
        }
    }
    cout << upper << endl;
    for (int i = 0; i < n; i++)
    {
        cout << validResults[i] << endl;
    }
    
    return 0;
}

Compilation message (stderr)

jobs.cpp: In function 'int main(int, const char**)':
jobs.cpp:29:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |             for (int j = 0; j < requestsByDay[i].size(); j++)
      |                             ~~^~~~~~~~~~~~~~~~~~~~~~~~~
jobs.cpp:23:13: warning: unused variable 'reqIndex' [-Wunused-variable]
   23 |         int reqIndex = 0;
      |             ^~~~~~~~

• Subtask 1: 80 / 100