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<DIV>I got asked to write an algorithm generating all possibile parenthetical permutations of a string containing a simple arthmetic experssion (+,-,*). Ran out of time, but ran across the catalan number sequence as the way to do it. Has anybody done this in perl? <BR> </DIV>---<BR>Mark Mertel<BR>206.441.4663<BR>mark.mertel@yahoo.com<BR>http://www.linkedin.com/in/markmertel<BR>http://www.seattlejobs.com/13147468
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