My soln. in C++

void checkMagazine(vector magazine, vector note) {

unordered_map<string, int> wordsMap;

for (const string& word : magazine){

    if (wordsMap.find(word) == wordsMap.end()) { //key not in map
        //create new entry
        wordsMap[word] = 1;

    } else {
        //increment entry
        wordsMap[word]++;
    }
}

for (const string& word : note) {
    //if word is not in map or count = 0, fail
    if (wordsMap.find(word) == wordsMap.end() || wordsMap[word] == 0) {

        std::cout << "No" << std::endl;
        return;
    } else { //else, continue and decrement entry

        wordsMap[word]--;
    }

}
std::cout << "Yes" << std::endl;

}