#include <iostream>
using namespace std;
// your code here: declare namespace A with int threshold=50
namespace A { int threshold = 50; };
// your code here: declare namespace B with int threshold=75
namespace B { int threshold = 75; };
int main() {
cout << "A.threshold=" << A::threshold << "\n";
cout << "B.threshold=" << B::threshold << "\n";
return 0;
}