1#include <iostream>
2#include <stdexcept>
3using namespace std;
4 
5class Config {
6public:
7    Config(int value) {
8        if (value < 0) {
9            throw invalid_argument("Negative value");
10        }
11        cout << "Config created: " << value << endl;
12    }
13};
14 
15int main() {
16    try {
17        Config c1(10);
18        Config c2(-1);
19        Config c3(20);
20    } catch (const invalid_argument& e) {
21        cout << e.what() << endl;
22    }
23    return 0;
24}