#include <iostream>

using namespace std;

unsigned int x, x_backup;
int i = 0;

// This assignment is worth 5 points.
// -1 for forgetting the 0b prefix.
// -1 for having extra leading 0s in output.
// -2 if math library was used.

int main()
{
	cout << "Enter a number: ";
	cin >> x;

	x_backup = x;

	cout << "Binary value is 0b";

	while(x > 0)	// This loop determines the highest power of 2 needed
	{
		i++;
		x /= 2;	// You can also use x >>= 1 instead
	}

	x = x_backup;

	for(i--; i >= 0; i--)
	{
		cout << x/(1 << i);
		x %= (1 << i);
	}

	return 0;
}