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vertical traversal of binary tree
“vertical traversal of binary tree” Code Answer’s
vertical traversal of binary tree
cpp by
Rid09
on Jun 09 2020
Donate
2
/* This is just a function of vertical traversal of binary tree. You need to write required code. Thank you. */ // Class to store node and it's distance from parent. class Obj { public: Node *root; int dis; Obj(Node *node, int dist) { root = node; dis = dist; } }; // Main logic of vertical traversal. void verticalTraversal(Node *root) { queue<Obj*> q; Obj *ob = new Obj(root, 0); q.push(ob); map<int, vector<int>> m; while(!q.empty()) { Obj *ob = q.front(); q.pop(); if(m.find(ob->dis) != m.end()) { m[ob->dis].push_back(ob->root->data); } else { vector<int> v; v.push_back(ob->root->data); m[ob->dis] = v; } if(ob->root->left != NULL) q.push(new Obj(ob->root->left, ob->dis-1)); if(ob->root->right != NULL) q.push(new Obj(ob->root->right, ob->dis+1)); } for(auto it=m.begin(); it!=m.end(); it++) { vector<int> v1 = (*it).second; for(int j = 0; j<v1.size(); j++) cout << v1[j] << "\t"; } cout << endl; }
vertical traversal of binary tree
java by
DarkPhilosopher
on May 04 2020
Donate
0
// Java program for printing vertical order of a given binary tree import java.util.TreeMap; import java.util.Vector; import java.util.Map.Entry; public class VerticalOrderBtree { // Tree node static class Node { int key; Node left; Node right; // Constructor Node(int data) { key = data; left = null; right = null; } } // Utility function to store vertical order in map 'm' // 'hd' is horizontal distance of current node from root. // 'hd' is initially passed as 0 static void getVerticalOrder(Node root, int hd, TreeMap<Integer,Vector<Integer>> m) { // Base case if(root == null) return; //get the vector list at 'hd' Vector<Integer> get = m.get(hd); // Store current node in map 'm' if(get == null) { get = new Vector<>(); get.add(root.key); } else get.add(root.key); m.put(hd, get); // Store nodes in left subtree getVerticalOrder(root.left, hd-1, m); // Store nodes in right subtree getVerticalOrder(root.right, hd+1, m); } // The main function to print vertical order of a binary tree // with the given root static void printVerticalOrder(Node root) { // Create a map and store vertical order in map using // function getVerticalOrder() TreeMap<Integer,Vector<Integer>> m = new TreeMap<>(); int hd =0; getVerticalOrder(root,hd,m); // Traverse the map and print nodes at every horigontal // distance (hd) for (Entry<Integer, Vector<Integer>> entry : m.entrySet()) { System.out.println(entry.getValue()); } } // Driver program to test above functions public static void main(String[] args) { // TO DO Auto-generated method stub Node root = new Node(1); root.left = new Node(2); root.right = new Node(3); root.left.left = new Node(4); root.left.right = new Node(5); root.right.left = new Node(6); root.right.right = new Node(7); root.right.left.right = new Node(8); root.right.right.right = new Node(9); System.out.println("Vertical Order traversal is"); printVerticalOrder(root); } }
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