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Re:HASH。拆成a1x13+ a2x23=-（a3x33+ a4x43+ a5x53）狂超时~~！看看过的程序是拆成a1x13+ a2x23+ a3x33=-（a4x43+ a5x53），改成这样的确用时少，为什么？？In Reply To:HASH。拆成a1x13+ a2x23=-（a3x33+ a4x43+ a5x53）狂超时~~！看看过的程序是拆成a1x13+ a2x23+ a3x33=-（a4x43+ a5x53），改成这样的确用时少，为什么？？ Posted by:z__jj at 2009-03-12 15:35:07 第一个计算了3次*-1,第二个只计算2次*-1 Followed by: Post your reply here: |
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