@above format got messed up and re-posting.. while ( ++i < N) { if (A[i] <= mid && A[i] > left) { right = mid; mid = A[i]; } else if (A[i] > mid && A[i] <= right) { left = mid; mid = A[i]; } else break; }
On 31 Dec, 10:17, Lucifer <sourabhd2...@gmail.com> wrote: > @atul.. thanks for pointing out the editing mistake.. > > I have fixed the while loop below: > > while ( ++i < N){ if (A[i] <= mid && A[i] > left) { right = > mid; > mid = A[i]; } else if (A[i] > mid && A[i] <= right) { > left = mid; > mid = A[i]; } else break;} > > On 31 Dec, 01:45, atul anand <atul.87fri...@gmail.com> wrote: > > > > > > > > > while ( ++i < N) > > { > > if (A[i] <= mid && A[i] > left) > > { > > *mid = A[i]; // both mid and right will contain same value** > > right = mid;* > > > // right=mid; /* i guess this is what you want....*/ > > // mid=A[i] > > * > > * > > } > > else if (A[i] > mid && A[i] <= right) > > { > > *mid = A[i]; // * *// both mid and left will contain same value* > > * > > left = mid;* > > } > > else > > break; > > > } > > > bcozz every node should have single child then how should > > i interpret mid,left,right ?? > > > On Fri, Dec 30, 2011 at 1:54 PM, Lucifer <sourabhd2...@gmail.com> wrote: > > > @An idea... > > > > Let the array of integers be A[N].. > > > > If N < = 3, then the answer would be YES. > > > > If N > 3, then the following algo will follow: > > > // The algo is self explanatory as its just ensuring BST property > > > keeping in mind that a parent node has only one child... > > > > int left = smallest(A[0], A[1], A[2]) ; > > > int right = greatest(A[0], A[1], A[2] ; > > > int mid = A[0] + A[1] + A[2] - left - right; > > > > int i = 2; > > > > while ( ++i < N) > > > { > > > if (A[i] <= mid && A[i] > left) > > > { > > > mid = A[i]; > > > right = mid; > > > } > > > else if (A[i] > mid && A[i] <= right) > > > { > > > mid = A[i]; > > > left = mid; > > > } > > > else > > > break; > > > } > > > > if ( i == N) > > > printf ("YES"); > > > else > > > print("NO"); > > > > On 30 Dec, 12:51, top coder <topcode...@gmail.com> wrote: > > > > Input : You have been given a sequence of integers. > > > > Now without actually constructing BST from the given sequence of > > > > integers (assuming the sequence is pre-order) determine if each node > > > > of BST has single child (either left or right but not both). > > > > Output : YES if given integer sequence corresponds to such a BST. > > > > otherwise say NO. > > > > > Ex. Say NO for 16,10,8,9,29,27,22. > > > > Say YES for 10,19,17,14,15,16 > > > > > I know the algo O(N^2) as follows: > > > > For every node in array(traverse from left to right), > > > > all the other nodes must be less or all the nodes must be greater > > > > than it. > > > > > But interviewer is expecting O(N). Any ideas? > > > > -- > > > 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. -- 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.