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Inorder.cpp
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100 lines (79 loc) · 1.95 KB
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// #include<iostream>
// #include <vector>
// using namespace std;
//// kyu ni chal rahacode
// struct Node {
// int data;
// Node* left;
// Node* right;
// Node(int val) {
// data = val;
// left = right = NULL;
// }
// };
// int idx = -1;
// Node* buildTree (vector<int>preorder){
// idx++;
// if (preorder[idx]==-1){
// return NULL ;
// }
// Node* root = new Node(preorder[idx]);
// root->left = buildTree(preorder); // left
// root->right = buildTree(preorder); // right
// return root;
// }
// void inorder(Node* root){
// if(root== NULL);{
// return;
// }
// inorder(root -> left);
// cout << root -> data<< "";
// inorder (root ->right);
// }
// int main (){
// vector <int> preorder = {1,2,-1,-1,3,4,-1,-1,5,-1,-1};
// Node* root = buildTree (preorder);
// inorder(root);
// cout <<endl;
// return 0;
// }
/// CGPT upper wale or yeh same hai fir bhi
#include<iostream>
#include <vector>
using namespace std;
struct Node {
int data;
Node* left;
Node* right;
Node(int val) {
data = val;
left = right = NULL;
}
};
int index = -1;
Node* buildTree(const vector<int>& preorder)
{
index++;
if (preorder[index] == -1) return NULL;
Node* root = new Node(preorder[index]);
root->left = buildTree(preorder);// left
root->right = buildTree(preorder);// right
return root;
}
void inorder(Node* root){
if(root == NULL)
{
return;
}
inorder(root->left);
cout << root->data << " ";
inorder(root->right);
}
int main ()
{
vector <int> preorder = {1,2,-1,-1,3,4,-1,-1,5,-1,-1};
Node* root = buildTree(preorder);
inorder(root);
cout << endl;
return 0;
}