#include <iostream>
using namespace std;
class A{
public:
static int a;
};
class B: public A{
public:
static int a; // hide base member
};
int A::a;
int B::a;
int main(){
A::a=10;
B::a=20;
B k;
cout << "\n" << B::a << k.a;
return 0;
}
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