/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
import java.util.*;
 
 class Output
  {
    public static double sumOfList(List<Number> list)
    {
        double s=0.0;
 
        for(Number n:list)
            s+=n.doubleValue();
 
        return s;
    }
 
    public static void main(String[] args) 
    {
        List<Number> li=Arrays.asList(1,2,3);
        System.out.println(sumOfList(li));
    }
  }

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