Nested Namespace Declaration

#include <iostream>
using namespace std;

namespace Config {
    namespace ADC { int resolution = 12; }
    namespace PWM { int frequency = 1000; }
}

int main() {
    // your code here: print resolution and frequency with their namespace paths
    using namespace Config;
    cout <<"ADC.resolution=" <<ADC::resolution <<"\n";
    cout <<"PWM.frequency="<<PWM::frequency;
    return 0;
}