题解 | 记票统计

#include <iostream>
#include <vector>
#include <map>
using namespace std;

int main() {
    int n, m;
    string name;

    while (cin >> n) {
        vector<string> arr(n);
        map<string, int> dict;
        int invalid_count = 0;

        for (int i = 0; i < n; i++) {
            cin >> name;

            arr[i] = name;
            dict[name] = 0;
        }

        cin >> m;

        for (int i = 0; i < m; i++) {
            cin >> name;
            if (dict.find(name) != dict.end()) {
                dict[name]++;
            } else {
                invalid_count++;
            }
        }

        for (auto s : arr) {
            //cout << s << endl;
            cout << s << " : " << dict[s] << endl;
        }

        cout << "Invalid " << ": " << invalid_count << endl;
    }

    return 0;
}