if n=1,2,3 n we denote Push by "P" and Pop by "X" the we can generate following permutations :
1) PPPXXX = 321 2) PPXXPX = 213 3) PXPXPX = 123 4) PXPPXX = 132 5) PPXPXX = 231 conditions : #P's = #X's and At no point, #X's>#P's Ques :- Given n elements, find the number of permutations which are possible and which are not possible. -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to algogeeks@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.
