# Palindrome Index – HackerRank Solution

In this post, we will solve Palindrome Index HackerRank Solution. This problem (Palindrome Index) is a part of HackerRank Problem Solving series.

## Solution – Palindrome Index – HackerRank Solution

### C++

```#include<iostream>
#include<string>
using namespace std;

bool ispalin(string str)
{
int i = 0, j = str.length() - 1;
while (i < j)
{
if (str[i] != str[j]) return false;
i++, j--;
}
return true;
}

int main()
{
int t;
cin >> t;
while (t--)
{
string str;
cin >> str;
int i = 0, len = str.length(), j = len - 1;
int ans = -1;
while (i < j && str[i] == str[j]) i++, j--;
if (i < j)
{
string str1 = str.substr(0, i) + str.substr(i + 1, str.length() - i - 1);
if (ispalin(str1)) ans = i;
string str2 = str.substr(0, j) + str.substr(j + 1, str.length() - j - 1);
if (ispalin(str2)) ans = j;
}
cout << ans << endl;
}
return 0;
}
```

### Python

```#!/bin/python3

import sys
from collections import Counter

def is_palindrome(s):
return s == s[::-1]

def palindromeIndex(s):
ret = -1
lens = len(s)
ind = 0

if is_palindrome(s):
return ret

while ind < lens//2:
if s[ind] != s[lens-ind-1]:
if s[ind+1] == s[lens-ind-1] and s[ind+2] == s[lens-ind-2]:
ret = ind
break
else:
ret = lens-ind-1
break
ind += 1

return ret

q = int(input().strip())
for a0 in range(q):
s = input().strip()
result = palindromeIndex(s)
print(result)
```

### Java

```import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {
static int palindromeIndex(String s){
for(int x=0;x<=(s.length()-1)/2;x++)
{
if(s.charAt(x)!=s.charAt(s.length()-1-x))
{
if(s.charAt(x+1)==s.charAt(s.length()-1-x)&&s.charAt(x+2)==s.charAt(s.length()-2-x))
{
return x;
}
if(s.charAt(x)==s.charAt(s.length()-2-x))
{
return s.length()-x-1;
}
}
}
return -1;
// Complete this function
}

public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int q = in.nextInt();
for(int a0 = 0; a0 < q; a0++){
String s = in.next();
int result = palindromeIndex(s);
System.out.println(result);
}
}
}
```

Note: This problem (Palindrome Index) is generated by HackerRank but the solution is provided by CodingBroz. This tutorial is only for Educational and Learning purpose.