C++ map

#include <bits/stdc++.h>

using namespace std;

int main() {
    map<string, int> mp;
    mp["Birzhan"] = 35;
    mp["Yerlan"] = 13;
    mp["Arman"] = 15;
    mp["Zhangir"] = 23;

    if (mp.find("Zhangir") != mp.end()) {
        cout << "YES" << endl;
    } else {
        cout << "NO" << endl;
    }

    mp.erase("Zhangir");

    if (mp.find("Zhangir") != mp.end()) {
        cout << "YES" << endl;
    } else {
        cout << "NO" << endl;
    }

    for (auto x: mp) {
        cout << x.first << " " << x.second << endl;
    }

    return 0;
}