-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathPalindrome LL.cpp
75 lines (71 loc) · 1.26 KB
/
Palindrome LL.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
//Check if a linked list is a palindrome
#include <iostream>
using namespace std;
class node{
public:
int data;
node * next;
node(int data){
this->data=data;
this->next=NULL;
}
};
node* takeinput(){
int data;
cin>>data;
node* head=NULL,*tail=NULL;
while(data!=-1){
node *newnode=new node(data);
if(head==NULL) {
head=newnode;
tail=newnode;
}
else{
tail->next=newnode;
tail=newnode;
}
cin>>data;
}
return head;
}
void print(node *head)
{
node*temp=head;
while(temp!=NULL)
{
cout<<temp->data<<" ";
temp=temp->next;
}
cout<<endl;
}
bool check_palindrome(node* head)
{
if(head==NULL)
return true;
//write your code here
node*temp=head;
node*t=head;
node *prev=NULL;
while(t->next!=NULL)
{ prev=t;
t=t->next;
}
if(temp->data==t->data)
{
prev->next=NULL;
//delete t;
return check_palindrome(head->next);
}
else
return false;
}
int main()
{
node*head=takeinput();
bool ans=check_palindrome(head);
if(ans)
cout<<"true";
else
cout << "false";
return 0;
}