counter

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

using namespace std;

int CountAndAddNewDogs(const vector<string>& new_dogs, const map<string, int>& max_amount,
                       map<string, int>& shelter) {
    map<string, int> my_max_amount;
    for (auto& [k, v] : max_amount) {
        my_max_amount.insert({k, v});
    }
    int counter = 0;
    for (const string& dog : new_dogs) {
        int delta = my_max_amount[dog] - shelter[dog];
        if (delta > 0) {
            ++counter;
            ++shelter[dog];
        }

    }

    return counter;
}

int main() {
    map<string, int> shelter = {{"landseer"s, 1}, {"otterhound"s, 2}, {"pekingese"s, 2}, {"pointer"s, 3}};
    const map<string, int>& max_amount = {{"landseer"s, 2}, {"otterhound"s, 3}, {"pekingese"s, 4}, {"pointer"s, 7}};
    const vector<string>& new_dogs = {"landseer"s, "otterhound"s, "otterhound"s, "otterhound"s, "pointer"s};

    cout << CountAndAddNewDogs(new_dogs, max_amount, shelter) << endl;
    /*
    for (auto& [k, v] : shelter) {
        cout << k << " " << v << endl;
    }
     */
    return 0;
}