UVA - 10464 - Big Big Real Numbers

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.BigDecimal;

public class Main {

    public static void main(String[] args) throws IOException{
        InputStreamReader isr=new InputStreamReader(System.in);
        BufferedReader br=new BufferedReader(isr);
        StringBuffer sb = new StringBuffer("");
        int cases=Integer.parseInt(br.readLine());
        for(int i=0;i<cases;i++) {
            String[] str=br.readLine().split(" ");
            BigDecimal bd1=new BigDecimal(str[0]);
            bd1=bd1.add(new BigDecimal(str[1]));
            StringBuilder temp=new StringBuilder(bd1.toString());
            sb.append(zeros(temp)).append("\n");
        }
        System.out.print(sb);
    }
     static String zeros(StringBuilder s){
         int index=s.length()-1;
         while(s.charAt(index)=='0' && s.charAt(index-1)!='.'){
             index--;
         }
        
        return s.substring(0,index+1);
    }
}