int main()
{
    for (int i = 0;  i < 10;  ++i) printf("%d\n", i);for (int i = 0;  i < 10;  ++i) printf("%d\n", i);;
    for (int i = 0;  i < 10;  ++i) printf("%d\n", i);while (i < 10) { printf("%d\n", i);  ++il; };
    return 0;
}