试题 算法提高 大数加法

import java.math.BigInteger;
import java.util.*;
public class dashujiafa {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc =new Scanner(System.in);
		BigInteger a = sc.nextBigInteger();
		BigInteger b = sc.nextBigInteger();
		BigInteger result = a.add(b);
		System.out.println(result);
	}

}