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

using namespace std;

int main() {
    map<int, string> itos;
    itos.insert({1, "abc"});
    itos.insert({2, "def"});
    itos.insert({3, "ghi"});

    auto it = itos.find(2);
    it = find_if(itos.begin(), itos.end(), [](pair<int, string> p) { return p.second.find("g") != string::npos; });
    cout << it->first << ": " << it->second << endl;
}