http://www.geeksforgeeks.org/populate-inorder-successor-for-all-nodes/
1
#include <iostream>
2
#include <vector>
3
#include <algorithm>
4
#include <queue>
5
#include <stack>
6
#include <
string
>
7
#include <fstream>
8
using
namespace
std;
9
10
struct
node {
11
int
data;
12
struct
node *left, *right, *
next;
13
node() : data(
0
), left(NULL), right(NULL), next(NULL) { }
14
node(
int
d) : data(d), left(NULL), right(NULL), next(NULL) { }
15
};
16
17
void
populate(node *
root) {
18
static
node *next =
NULL;
19
if
(!root)
return
;
20
populate(root->
right);
21
root->next =
next;
22
next =
root;
23
populate(root->
left);
24
}
25
26
int
main() {
27
node *root =
new
node(
10
);
28
root->left =
new
node(
8
);
29
root->right =
new
node(
12
);
30
root->left->left =
new
node(
3
);
31
populate(root);
32
cout << root->data <<
"
->
"
<< (root->next? root->next->data : -
1
) <<
endl;
33
cout << root->left->data <<
"
->
"
<< (root->left->next? root->left->next->data : -
1
) <<
endl;
34
cout << root->right->data <<
"
->
"
<< (root->right->next? root->right->next->data : -
1
) <<
endl;
35
cout << root->left->left->data <<
"
->
"
<< (root->left->left->next? root->left->left->next->data : -
1
) <<
endl;
36
return
0
;
37
}
?
Data Structure Binary Tree: Populate Inorder Successor for all nodes
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