#include <iostream>

int i = 1;
int main()
{
    std::cout << i << "\n";
    if (i > 0) {
        int i = 2;
        std::cout << i << "\n";
        {
            int i = 3;
            std::cout << i << "\n";
        }
        std::cout << i << "\n";
    }
    std::cout << i << "\n";
}