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namespace A
{
int _a = 1;
int x = 2;
}
int marker4(){
using A::x;
return 0;
}
int marker3(){
return marker4();
}
int marker2()
{
namespace B = A;
B::_a;
return marker3();
}
int marker1()
{
int total = 0;
{
int b = 1;
{
using namespace A;
int c = 2;
{
int d = 3;
total = _a + b + c + d + marker2(); // marker1 stop
}
}
}
return total;
}
int main()
{
using namespace A;
_a;
return marker1();
}
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