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Re:没有理由啊！这样也能过哈！

Posted by 200730690105 at 2009-10-26 23:09:17 on Problem 1604
In Reply To:没有理由啊！这样也能过哈！ Posted by:zhangliqiang at 2007-09-13 13:21:33 
因为10000以内有个3125=5^5，这个3125与32相乘就是100000
而3125*5>10000,因此在10000以内的一次乘法中如果两个乘数的最后1位都不为0，那么最多能产生100000，而计算最后一个非零位恰恰要保证每一步的乘法在取余后不能全为0，因此%1000000正好（执行到乘以3125或3125的倍数的时候最后5位全部为0）
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