We consider a particular kind of a binary tree called a Binary And when we visit nodes on the right, we get a postorder When we visit nodes from the below, we get an inorder traversal. The Euler tour in which we visit nodes on the left produces a preorder traversal. In this walk each node will be visited either on the left, or under the below, or on the right. An Euler tour is a walk around the binary tree where each edge is treated as a wall, which you cannot cross. These common traversals can be represented as a single algorithm by assuming that we visit each node three times. Number 1 denote the first node in a particular traversal and 7 denote the last node. In the next picture we demonstarte the order of node visitation. This traversal visits nodes by levels from top to bottom and from left to right.Īs an example consider the following tree and its four traversals: There is only one kind of breadth-first traversal-the level order traversal.
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