#include <iostream>
using namespace std;

int value = 100;

int main()
{
	int value = 10 ;
	//Scope of this is till end of the function
	cout << value << endl ;
	{
		int value = 20 ;
		//scope of this is till closing brace B
		cout << value << endl ;
		{
			int value = 30 ; //Scope till closing brace A
			cout << value << endl ;
		} //A
		cout << value << endl ;
	}  //B
	cout << value << endl ;
	cout << ::value << endl ;
	return 0;
}