Тимофей 1

#include <iostream>

// main - функция которая запускается первой
int main() {
//    std::cout << "Hello!";

//    int a, b;
//    std::cin >> a >> b;
//    int c = a + b;
//    std::cout << c << "\n";
//
//    a = 4;
//    b = 3;
//    c = 1;
////    int a, b, c;
////    std::cin >> a >> b >> c;
//    std::cout << a - b - c << "\n";

    // a - b - c;

//    int kek = 10000000000;
////    kek = 3;
////    kek = kek + 4;
//    std::cout << kek;

    double a = 1999, b = 1000;
    double x1 = a + b;
    double x2 = a - b;
    double x3 = a * b;
    double x4 = a / b;
    std::cout << x1 << " " << x2 << " " << x3 << " " << x4 << "\n";

    return 0;
}