#include <iostream>
#include <list>
#include <iterator>
#include <algorithm>
#include <functional>
 
int main ( ) {
	std :: list < int > myList ( std :: istream_iterator < int > ( std :: cin ) , std :: istream_iterator < int > ( ) ) ;
	std :: list < int > resultList ;
	std :: copy_if ( myList.begin () , myList.end ( ) , std :: back_inserter ( resultList ) , std :: bind2nd ( std :: less < int > ( ) , 0 ) ) ;
	std :: copy ( resultList.begin ( ) , resultList.end ( ) , std :: ostream_iterator < int > ( std :: cout , " " ) ) ;
	std :: cout << std ::endl ;
}

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-10 6 4 2 6 -4 2 9 -9