@vivek: read again: ) = -1 ( = +1
Keep a sum of all these as u iterate. That should never be negative Plus check for these types (if you need correct arithmetic expressions as well *some operator followed by )* * or / after a ( () -------------------------------------------------- Rohit Saraf Second Year Undergraduate, Dept. of Computer Science and Engineering IIT Bombay http://www.cse.iitb.ac.in/~rohitfeb14 On Fri, Jun 11, 2010 at 12:07 PM, Vivek Sundararajan < s.vivek.ra...@gmail.com> wrote: > @Rohit > > Consider : (a+)b > > The above is not well formed! :) > > On 11 June 2010 11:58, Rohit Saraf <rohit.kumar.sa...@gmail.com> wrote: > >> @BALARUKESH : >> What are you saying !! >> and Why would this not work >> >> As you start you get sum -1 at start itself. Hence you quit. >> The sum should be >0 always and 0 at last >> >> -------------------------------------------------- >> Rohit Saraf >> Second Year Undergraduate, >> Dept. of Computer Science and Engineering >> IIT Bombay >> http://www.cse.iitb.ac.in/~rohitfeb14 >> >> >> On Fri, Jun 11, 2010 at 11:09 AM, BALARUKESH >> <sbalarukesh1...@gmail.com>wrote: >> >>> The increment and decrement method wont work correctly for all >>> cases.... >>> Ex:- >>> ))a+b(( >>> This is not a well formed parenthesis... But satisfies the algorithm. >>> The better way is to use a stack... When u find a ' ( ' push it into >>> the stack and when u find a ' )' pop off the top element. Finally the >>> stack should be empty. If [stack has one or more ' ( ' ] or [the stack >>> is empty and exp is not empty] then it is not a well formed >>> parenthesis... >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Algorithm Geeks" group. >>> To post to this group, send email to algoge...@googlegroups.com. >>> To unsubscribe from this group, send email to >>> algogeeks+unsubscr...@googlegroups.com<algogeeks%2bunsubscr...@googlegroups.com> >>> . >>> For more options, visit this group at >>> http://groups.google.com/group/algogeeks?hl=en. >>> >>> >> -- >> You received this message because you are subscribed to the Google Groups >> "Algorithm Geeks" group. >> To post to this group, send email to algoge...@googlegroups.com. >> To unsubscribe from this group, send email to >> algogeeks+unsubscr...@googlegroups.com<algogeeks%2bunsubscr...@googlegroups.com> >> . >> For more options, visit this group at >> http://groups.google.com/group/algogeeks?hl=en. >> > > > > -- > "Reduce, Reuse and Recycle" > Regards, > Vivek.S > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to algoge...@googlegroups.com. > To unsubscribe from this group, send email to > algogeeks+unsubscr...@googlegroups.com<algogeeks%2bunsubscr...@googlegroups.com> > . > For more options, visit this group at > http://groups.google.com/group/algogeeks?hl=en. > -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to algoge...@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
