Monthly_affairs

#include <vector>
#include <iostream>
#include <string>
#include <map>

void next(int month, std::map<int, std::vector<std::string>>& tasks)
{
    int months[12]{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    if (months[month] < months[month-1])
    {
        for (int i = months[month-1]; i > months[month]; --i)
        {
            for(const auto& t : tasks[i])
            {
                tasks[months[month]].push_back(t);
            }
            tasks[i].clear();
        }

    }
}

void add(std::map<int, std::vector<std::string>>& tasks) {
    int day;
    std::cin >> day;
    std::string task;
    std::cin >> task;
    tasks[day].push_back(task);
}

void dump(std::map<int, std::vector<std::string>>& tasks)
{
    int day;
    std::cin >> day;
    std::cout << tasks[day].size() << " ";
    for (const auto& t : tasks[day])
    {
        std::cout << t << " ";
    }
    std::cout << std::endl;
}


int main()
{
    int q;
    std::cin >> q;
    std::map<int, std::vector<std::string>> tasks;

    int month = 0;
    for (int i = 0; i < q; i++)
    {
        std::string action;
        std::cin >> action;
        if (action == "NEXT") {
            month += 1;
            next(month, tasks);
        }
        else
        {
            if (action == "ADD") {
                add(tasks);
            }
            else if(action == "DUMP")
            {
                dump(tasks);
            }
        }
    }
}