题目描述

出题真简单

正着出一道 反正还能出一道

C++ 代码

#include <bits/stdc++.h>
using namespace std;
int n, k;
int main()
{
    cin >> n >> k;
    unordered_map<string, vector<int>> m;
    while (k --)
    {
        int i, ni;
        cin >> i >> ni;
        while (ni --)
        {
            string name;
            cin >> name;
            m[name].push_back(i);
        }
    }
    string name;
    while (cin >> name)
    {
        cout << name << " " << m[name].size() << " ";
        sort(m[name].begin(), m[name].end());
        for (auto i : m[name]) cout << i << " ";
        cout << endl;
    }
}