UVA - 10494 If We Were a Child Again

用java写的大数基本操作，java要求的格式比较严谨。

 import java.util.*;
 import java.math.*;
 public class Main {
         public static void main(String args[]) {
             Scanner cin = new Scanner(System.in);

             BigInteger a,b,ans;
             String c;
             b = BigInteger.valueOf();
             a = BigInteger.valueOf();
         //    BigInteger zero=new BigInteger("0");

             while(cin.hasNext())
             {
                 a=cin.nextBigInteger();
                 c=cin.next();
                 b=cin.nextBigInteger();
                 if(c.equals("/"))
                     ans = a.divide(b);
                 else
                     ans=a.mod(b);
                 System.out.println(ans);
             }
             return ;
     }

 }

还有一些关于java的基本操作，参见大佬博客：https://blog.csdn.net/Akatsuki__Itachi/article/details/81152232