Find the largest palindrome made from the product of two n-digit numbers.
Since the result could be very large, you should return the largest palindrome mod 1337.
Example:
Input: 2
Output: 987
Explanation: 99 x 91 = 9009, 9009 % 1337 = 987
Note:
The range of n is [1,8].
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[LeetCode] Largest Palindrome Product 最大回文串乘积
原文：http://www.cnblogs.com/grandyang/p/7644725.html