Реализовать программу с использованием контейнеров set / multiset

#include <iostream>
#include <vector>
#include <string>
using namespace std;
 
int main()
{
   
    struct house
    {
        unsigned id;
        vector<unsigned> toylist;
    };
 
   
    struct toy
    {
        unsigned id;
        string name;
    };
 
   
    vector<house> houses;
    vector<toy> toys;
    toy c_toy;
    house c_house;
    vector<unsigned> t_list;
 
  
    char ch = 'y';
    unsigned toy_id = 1;
    string toy_name;
    do
    {
        cout << toy_id << " toy: ";
        getline(cin, toy_name);
        c_toy.id = toy_id;
        c_toy.name = toy_name;
        toys.push_back(c_toy);
        cout << "Add one more toy? (y/n): ";
        cin >> ch;
        cin.ignore();
        if ((ch == 'y') || (ch == 'Y'))
            toy_id++;
    } while ((ch == 'y') || (ch == 'Y'));
 
   
    for (unsigned i = 0; i < toys.size(); ++i)
    {
        cout << "Toy " << toys[i].id << " - " << toys[i].name << endl;
    }
 
    
    unsigned house_id = 1;
    unsigned toy_num;
    do
    {
        cout << house_id << "kindergarten. Add number of toy: " << endl;
       
        do
        {
            cin >> toy_num;
            t_list.push_back(toy_num);
            cout << "add more? (y/n): ";
            cin >> ch;
            cin.ignore();
        } while ((ch == 'y') || (ch == 'Y'));
 
        c_house.id = house_id;
        c_house.toylist = t_list;
        t_list.clear();
        houses.push_back(c_house);
        cout << "add more kindergarten? (y/n): ";
        cin >> ch;
        if ((ch == 'y') || (ch == 'Y')) house_id++;
    } while ((ch == 'y') || (ch == 'Y'));
 
    
    for (unsigned i = 0; i < houses.size(); ++i)
    {
        cout << "kindergarten √" << houses[i].id << " - Toys: ";
        for (unsigned j = 0; j < houses[i].toylist.size(); ++j)
            cout << houses[i].toylist[j] << " ";
        cout << endl;
    }
 
   
    unsigned t;
    bool founded = false;
    vector<unsigned> t1, t2;
    for (unsigned i = 0; i < toys.size(); i++)
    {
        t = toys[i].id;
        for (unsigned j = 0; j < houses.size(); j++)
        {
            for (unsigned k = 0; k < houses[j].toylist.size(); k++)
            {
                if (t == houses[j].toylist[k])
                    founded = true;
            }
            if (founded) t1.push_back(t);
            founded = false;
        }
        unsigned h = houses.size();
        if (t1.size() == h)
            t2.push_back(t);
        t1.clear();
    }
    cout << "Toys that are in all kindergartens:" << endl;
    for (unsigned i = 0; i < t2.size(); ++i)
        for (unsigned j = 0; j < toys.size(); ++j)
            if (t2[i] == toys[j].id)
                cout << t2[i] << " (" << toys[j].name << "), ";
    cout << endl;
 
 
 
    
    t1.clear();
    t2.clear();
    founded = false;
    for (unsigned i = 0; i < toys.size(); i++)
    {
        t = toys[i].id;
        for (unsigned j = 0; j < houses.size(); j++)
        {
            for (unsigned k = 0; k < houses[j].toylist.size(); k++)
            {
                if (t == houses[j].toylist[k])
                    founded = true;
            }
            if (!founded) t1.push_back(t);
            founded = false;
        }
        unsigned h = houses.size();
        if (t1.size() == h)
            t2.push_back(t);
        t1.clear();
    }
    cout << "Toys that are not in any kindergarten:" << endl;
    for (unsigned i = 0; i < t2.size(); ++i)
        for (unsigned j = 0; j < toys.size(); ++j)
            if (t2[i] == toys[j].id)
                cout << t2[i] << " (" << toys[j].name << "), ";
    cout << endl;
 
    return 0;
}