import java.util.stream.*; 
import static java.util.stream.Collectors.*; 
import java.util.function.*; 

public class CollectorsTest{ 
	public static void main(String[] args){ 
		System.out.println(Stream.of(args).map(Integer::new).reduce(new Integer(1),(a,b)->a+b,(a,b)->a+b)); 
	} 
}