#include <iostream>
#include <stdexcept>

int func3(int input) {
    std::cout << "func3 start" << std::endl;
    if (input < 10)
        throw std::runtime_error("Exception in func3");
    else std::cout << "Num: " << input << std::endl;
    std::cout << "func3 end" << std::endl;
    return 0;
}

int func2(int input) {
    std::cout << "func2" << std::endl;
    func3(input);
    return 0;
}

int  func1(int input) {
    std::cout << "func1" << std::endl;
    func2(input);
    return 0;
}

int main(int argc, char* argv[]) {
    int input = std::stoi(argv[1]);
    try {
        std::cout << "main" << std::endl;
        func1(input);
    } catch (const std::exception& e) {
        std::cerr << "Exception caught: " << e.what() << std::endl;
    }

    return 0;
}