#include <iostream>

namespace MyNameSpace
{
    int x;
}
namespace MySecondNameSpace
{
    int x;
}

int main()
{
    MyNameSpace::x = 123;
    MySecondNameSpace::x = 456;
     std::cout << "1st x: " << MyNameSpace::x << ", 2nd x: " <<
     MySecondNameSpace::x;
}
