#include #include #include #include #include #include using namespace std;

string test;

int main() { while(cin>>test) { if(test=="0") break;

	int len = test.length();
	int i,k=1,result=0;

	for(i=len-1;i>=0;i--)
	{
		result = result+ (int)(test[i]-'0')*(int)(pow((double)2,k)-1);
		k++;
	}
	cout<<result<<endl;
}
return 0;

}

#include #include #include #include #include #include using namespace std;

string test;

int main() { while(cin>>test) { if(test=="0") break;

	int len = test.length();
	int i,k=1,result=0;

	for(i=len-1;i>=0;i--)
	{
		result = result+ (int)(test[i]-'0')*(int)(pow((double)2,k)-1);
		k++;
	}
	cout<<result<<endl;
}
return 0;

}