作者LPH66 (-858993460)
看板puzzle
标题[中译] PuzzleUp 2010 (16) Generating 9-Letter Codes
时间Wed Oct 27 19:22:00 2010
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http://www.puzzleup.com/2010/
时限：2010/10/28（四）19:00～11/03（三）18:59
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◆Generating 9-Letter Codes
You will generate 9-letter codes changing the places of letters in the word
TRANSFORM. The condition is that none of the letters in the generated codes
will be on the same place as they were on the word TRANSFORM.
How many different codes can be generated?
Example: If the same question was asked for 4-letter codes with the letters
of the word DATA, the answer would be 2: ADAT, ATAD.
要产生由单字 TRANSFORM 重排字母後的九字母编码，
但产生的编码的每个字母都不在原来 TRANSFORM 一字的位置上。
问有几种如此的编码？
例: 若题目是问由 DATA 一字重排，则共有 ADAT, ATAD 两种。
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毫无反应就是个错排...
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"LPH" is for "Let Program Heal us"....
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◆ From: 140.112.30.139
1F：→ utomaya:这题可以用笔算 就是用排容定律去解 10/27 19:41
2F：推 meowth:.......................................... 10/27 20:42
※ 编辑: LPH66 来自: 140.112.30.139 (10/27 22:37)