class Main {   
    static void main() {
    		int a;
    		a = 0;
        Print(a++, "\n");
				Print(a, "\n");
        Print(++a, "\n");
				Print(a, "\n");				
        Print(a--, "\n");
				Print(a, "\n");
        Print(--a, "\n");
				Print(a, "\n");						
    }
}