A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 × 99.

Find the largest palindrome made from the product of two 3-digit numbers.

译文：

 

利用相同的方法寻找回文数。两个2位数字的乘积的最大回文是9009=91×99。

得到两个3位数字的乘积的最大回文。

1 import java.util.ArrayList; 2 import java.util.List; 3  4 public class Main 5 { 6     public static void main(String[] args)    7     { 8         List
           
             list = new ArrayList
            
             (); 9         int a=0;10         for(int i=99;i<1000;i++)11         {12             for(int j=99;j<1000;j++)13             {14                 list.add(j*i);15             }16         }17         List
             
               lis = new ArrayList
              
               ();18         for(int i=0;i
               
                100000)21             {22                 if(list.get(i) % 10 ==list.get(i) / 100000 && (list.get(i) /10)% 10 ==(list.get(i) / 10000)%10 && (list.get(i) / 1000)%10 ==(list.get(i) / 100)%10)23                 {24                     lis.add(list.get(i));25                 }26             }27         }28         int max=lis.get(0);29         for(int i=0;i
               
              
             
            
           

结果：

906609