1) Start from root, go to left and keep going left as long as left child is available, if not go to right child and again follow same procedure of going left until you reach a leaf node. 2) After step 1 sum of
for each recursive call. But the downside of the recursive solution is the the methods stack may get very deep.
The idea of above formula is simple, we one by one try all nodes as root (r varies from i to j in second term). When we makerthnode as root, we recursively calculate optimal cost from i to r-1 and r+1 to j. We add sum of frequencies from i to j (see first term in the ...
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[geeksforgeeks] Bottom View of a Binary Tree Bottom View of a Binary Tree Given a Binary Tree, we need to print the bottom view from left to right. A node x is there in output if x is the bottommost node at its horizontal distance. Horizontal distance of left child of a node x ...
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Mirror of a binary tree T is another binary tree M with the left and right children of all non-leaf nodes exchanged in T. Solution 1. Recursion, O(n) runtime Recursively get the mirror binary tree of the left child and right child of node N; ...
[GeeksForGeeks] Perfect Binary Tree Given a Binary Tree, write a function to check whether the given Binary Tree is a prefect Binary Tree or not. A Binary tree is Perfect Binary Tree in which all internal nodes have two children and all leaves are at same level....