2. Find

#include <iostream>
#include <string>
#include <map>

using namespace std;

bool isFound(map<string, string>& m, string& s) {
    for (auto it = m.begin(); it != m.end(); it++) {
        if (it->first == s) {
            return true;
        }
    }
    return false;
}

int main()
{
    string line, name, id;

    map<string, string> companies = {};

    while (true) {
        getline(cin, line);
        if (line == "end") {
            break;
        }
        name = line.substr(0, line.find(' '));
        id = line.substr(line.find(' ') + 1);

        companies.insert({ id, name });
    }

    cin >> id;

    printf(!isFound(companies, id) ? "[not found]\n" : "%s %s\n", companies[id].c_str(), id.c_str());

    return 0;
}