What will be the output of the following C++ code?

Content of header file h1.h
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h1.h
#include <iostream>
using namespace std;
namespace A{
	int func(int a){
		cout<<"using namespace A";
		return 2*a;
	}
}
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Content of header file h2.h
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h2.h
#include <iostream>
using namespace std;
namespace B{
	float func(float a){
		cout<<"using namespace B";
		return 2*a;
	}
}
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Content of program.cpp
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#include <iostream>
#include <string>
#include "h1.h"
#include "h2.h"
using namespace std;
using namespace A;
using namespace B;
int main(int argc, char const *argv[])
{
	/* code */
	int a = 10;
	float b = 10.0;
	cout<<func(a)<<endl;
	cout<<func(b);
	return 0;
}
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