inorder traversal
vector<int> v;
void inorder(TreeNode* root,vector<int> &v)
{
if(root==NULL)
return;
inorder(root->left,v);
v.push_back(root->val);
inorder(root->right,v);
}inorder traversal
vector<int> v;
void inorder(TreeNode* root,vector<int> &v)
{
if(root==NULL)
return;
inorder(root->left,v);
v.push_back(root->val);
inorder(root->right,v);
}inorder traversal
class Solution {
public List<Integer> inorderTraversal(TreeNode root) {
List<Integer> list = new ArrayList<Integer>();
return dfs(root, list);
}
private List<Integer> dfs(TreeNode root, List<Integer> list)
{
if(root == null)
return list;
list = dfs(root.left, list);
list.add(root.val);
return dfs(root.right,list);
}
}preorder traversal
#include <iostream>
using namespace std;
class node{
public:
int data;
node* left;
node* right;
node(int d){
data = d;
left = NULL;
right = NULL;
}
};
node* buildTree(){
int d;
cin>>d;
if(d==-1){
return NULL; //to attach a NULL pointer[in case of no child] enter -1
}
node * root = new node(d);
root->left = buildTree();
root->right = buildTree();
return root;
}
//REQUIRED FUNCTION: Inorder Traversal
void printIn(node*root){
if(root==NULL){
return;
}
//Otherwise Left Root Right
printIn(root->left);
cout<<root->data<<" ";
printIn(root->right);
}
int main(){
node* root = buildTree();
printIn(root);
return 0;
}
//SAMPLE INPUT TO RUN THE CODE ON ANY ONLINE IDE:
//8 10 1 -1 -1 6 9 -1 -1 7 -1 -1 3 -1 14 13 -1 -1 -1Copyright © 2021 Codeinu
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