which is correct....
which of the permutation o/p can't be obtained using stack for the i/p sequence 1,2,3,4,5 in that order <a>1,2,3,4,5 <b>1,2,5,4,3 <c>1,2,5,3,4 <d>1,2,4,5,3
which of the permutation o/p can't be obtained using stack for the i/p sequence 1,2,3,4,5 in that order<a>1,2,3,4,5 <b>1,2,5,4,3<c>1,2,5,3,4 <d>1,2,4,5,3