A+B

 1 import java.math.BigDecimal;  
 2 import java.util.*;  
 3 public class Main  
 4 {  
 5     public static void main(String[] args)  
 6     {  
 7         BigDecimal a, b, c;  
 8         Scanner cin = new Scanner(System.in);  
 9         while(cin.hasNext())  
10         {  
11             a = cin.nextBigDecimal();  
12             b = cin.nextBigDecimal();  
13             c = a.add(b);  
14             if(c.compareTo(BigDecimal.ZERO) == 0)  
15                 System.out.println("0");  
16             else  
17                 System.out.println(c.stripTrailingZeros().toPlainString());  
18         }  
19     }  
20 }