import java.util.Scanner; import java.math.BigInteger; // javaBigInteger永远的神 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); // 注意 hasNext 和 hasNextLine 的区别 BigInteger a; BigInteger b; while(in.hasNextBigInteger()) { BigInteger sum=new BigInteger("0"); a=in.nextBigInteger(); b=in.nextBigInteger(); sum=a.add(b); System.out.println(sum); } } }