#include <iostream>
using namespace std;

void f(int n)
{
	static char zz[] = "0123456789ABCDEF";

	if(n<0)
	{
		n=-n;
		cout.put('-');
	}
	
	if(n>15) f(n/16);
	cout.put( zz[n%16] );
}

main()
{
	f(-555555);
	
	return 0;
}