#include
#include
using namespace std;
int main( ){
const int num_lights = 15;
const bitset outside( 0xf );
const bitset inside( 0xff0 );
const bitset driveway( 0x7000 );
bitset lights;
for( int i = 0; i < num_lights; i +=2 )
lights.reset( i );
cout << lights;
}